We did what you did and started Elimination Communication at birth. DS is now 12 months and it's going well for us....I totally hear that yours didn't take to it but that doesn't mean that you can't re-introduce elements of EC to help with conventional toilet training. I know many parents who've done this with great success. You are actually starting PL a bit earlier than I've seen studies show, and I am rooting for you to start now! The avg age of potty independence in the US is now 3 years.
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First, for DS liking to pee standing up, try to take him outdoors or, yes, do it in the tub! If he won't sit on the mini potty, try a potty reducer on your toilet. Find an older toddler who can show him how and where to pee and poo.
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Here is an excerpt from my book that may have some tidbits for you...sorry it is so long but hope it will help someone PL a toddler :) I've bolded the sections that might apply more to your situation. I know you didn't ask for EC advice, but I think some of the below could really help.
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"28 Tips for Starting EC Later"
The following steps share how to start EC as a Late Starter (5-12 months) or Early Start Potty Training with a heavy EC influence (12+ months):
1. Learn EC, no matter what age your baby is. You may have to modify some parts (keep reading the rest of this section for modifying tips). [you already learned it, perhaps a refresher?]
2. Decide whether you want to incorporate elements of EC part-time, occasionally, or full-time. Do as much as you can without adding unnecessary stress to your lives. Remember that potty learning at any age is inconvenient so it doesn’t come as a surprise. [this just references a commitment to potty learning activities, which you can make no matter what method you choose.]
3. Switch to cloth diapers or modified disposables immediately (at least part-time) if you use disposables. You can eventually try switching to tiny trainers or undies if you wish.

This change will provide you (& your baby) with information about when your baby is wet so you can change him immediately. It will also help you begin learning his patterns and signals. [you've got him in cloth already.]
4. Change diapers immediately upon soiling. Break the habit of letting your baby sit in wetness. Either time your diaper changes to happen more frequently or use a cloth diaper, held in place sumo-style, which will help you know immediately when baby is wet.
5. Do diaper-free time as often as you are comfortable and able. This allows your older baby to learn “Cause & Effect”...when I feel pressure, then I release, wet stuff comes out. It informs baby about pee/poo (which has been hidden thus far) and speeds learning. You will also learn his signals and natural timing this way. See: How To Do Diaper-free Observation Time."
6. Go for the easy catches first. At first, rely more on Generic Timing (times when babies commonly have to go). This gets baby and you used to what a “catch” feels like, building confidence. Examples: during diaper change, upon waking, after taking out of carrier, etc.
7. Mobile baby? Modify observation time by either doing it over a non-carpet surface, naked-bottomed, and watching closely; or, observe while wearing your baby in a baby carrier.
8. Wear your baby more often and try co-sleeping. The closer you are to your baby, the more signals you will catch on to, as well as the natural timing of his pottying needs. (This applies to both mobile and non-mobile babies.)
9. Be sure to write down your baby’s Signals (if any) and Natural Timing during your observation periods, no matter how you adapt the observation step. Having a visual record will help you get in tune. Learning natural timing based on feeding and waking is generally easier.
10. If you choose to use verbal language and sign language before, during, and after pottying, be consistent. Do not praise, simply reflect what you see.
11. Experiment with the Position, Cue, Environment, & even Receptacle. Be open, flexible & creative.
12. Have an “open door” policy in your family’s bathroom. Let your baby watch you potty and potty with you (I’m on mine, you’re on yours). Model where the pee/poo goes, but don’t make it a big deal.
13. Spend time around other children who use the potty, if possible - whether they have been EC'd or not. It is invaluable for older babies to see other babies (or young children) using the potty instead of a diaper.
14. Discover what helps your baby relax & focus on the potty. Sing potty songs, keep a bin of potty-only toys next to her potty, run water in the sink.
15. Get support. Visit the IPT Late Starters Yahoo! Group. Send these experienced folks your challenges and let the good advice flow.
16. Be patient and don’t expect immediate results. Don’t get frustrated if it takes a while to unlearn going in the diaper...it normally takes several months or more.
17. Don’t compare yourself with others. Enjoy your baby’s personal pace.
18. Be matter-of-fact about poo and pee. If you notice yourself showing disgust (or other negative emotions) around poo and bodily fluid messes associated with potty learning (an attitude that is learned through cleaning so many messy diapers), remind yourself that pottying is natural; everybody poops.

A disgusted reaction may rub off on your toddler, emerging as stubbornness or attempts at control.

Likewise, over-celebrating, oogling over how great he pooped, and even praising can be detrimental to his autonomous desires. Be matter-of-fact.
19. Avoid negative language, attitude, and stance. Remember, punishment, coercion, anger, and pressure are not part of EC. In fact, if a wise toddler picks up on these negative vibes, it could very well sabotage the whole learning process!
20. Success and order varies. You may have success with poo first, then pee much later; pee then poo; nighttime then daytime; day then night. Take it as it comes, in whichever order it works.
21. Delayed signals are normal for late-starting toddlers. If he tells you every time after he poos in his pants, don’t worry...this is common for late starters. He will eventually start telling you before.
22. Potty pauses commonly happen for late starters (although they can happen to any baby). Your child is directly in the middle of so much learning and development, and with illness, teething, travel, and other life changes, potty learning becomes pushed to the end of the list for them. It’s also a time for pushing limits, and potty pauses can be a result of your toddler’s desire to test things out a bit. Let him explore and trust him to learn. Be patient. (let me know if you want more info on Potty Pauses.)
23. Use “reflective language” & enlist an older baby’s help in clean-up. When your older baby has a miss in the home, state matter-of-factly, “You peed/pood on the living room floor. Pee/poo goes in the potty.” Then, enlist her help in cleaning it up and taking it to the bathroom. Be consistent with this. Do not punish; be gentle yet clear in your reflections of what happened...and what should happen.
24. Talk about things openly with your child, when they happen (matter-of-factly, where it goes, how it just went in an undesirable space, where pee/poo belongs, how it feels, his feelings around it, etc.). He can understand more than you think.
25. Trust your intuition as it develops. Notice thoughts, images, or sensations that lead you to a hunch that baby needs to go, and act on them.
26. Trust your baby’s growing intuition as it develops. As she learns about herself, she may want more and more control over the pottying process. Trust her to experiment and learn in her own way. If she insists that she doesn’t need to go, or that she can do it herself, listen and give that a chance to be. She will learn from trying to rely on herself.
27. Read books together about pottying with your older child.
28. Enlist the help of family and older children. Get everyone involved for a very connecting and rewarding family experience. Older children tend to have extra-sensitive intuition around when a baby needs to potty.
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Again, I know that you didn't necessarily solicit advice about ECing a toddler...but I've seen many cases where parents of toddlers have had much success simply applying the principles of EC to conventional toilet training...it can help! I'm sure whatever you choose will be perfect for your situation, just wanted to remind you of what you've done with DS from the beginning. Windows open ALL THE TIME with babies...I look forward to hearing how it goes for you!
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Hope this helps you!
Andrea & Kaiva 12 mos.
EC Simplified