Hi, canadiyank!
"(Frankly, not being QF, hearing about early weaning to conceive again turns me off, but those may be minority. It's just "what you hear" you know...)."
I agree whole-heartedly! To me GF means allowing the LORD's plan work in our lives, not doing it ourselves. To wean early is, in my opinion, not following GOD's plan for us and our children. I believe that GOD meant for babies to nurse until they weaned naturally. Most bible historians would say that even in bible times the average age of weaning was about 3 years. When GOD gives us one of HIS wonderful blessings, we must care for that blessing first and foremost, not worry about having another to come along. If GOD sends us another soon, that is HIS plan, (and tandem nursing helps the transition go more smoothly, not early weaning.)
As for me, like I had mentioned before, I have been against chemical and barrier forms of bc since soon after the birth of #1. Instead, I had researched and learned how to read my fertility signs. I felt that this was ok. I felt it was wrong to change our bodies in some way, but it was ok to abstain when fertile.
A WONDERFUL fellow mother a GREAT friend began to share with me the idea of QF.

At first I didn't see where NFP could be included in bc. GOD finally opened my eyes and heart and I believe it should all be left in HIS hands. I trust in HIM to care for my family, HIS children, and to give us the perfect amount of blessing.
The main scripture that opened my eyes is the command given to "be fruitful and multiply", which is given 5 times in the book of Gen. Not just multiply a couple of times, but enough to "FILL the earth".
This command is for all who love GOD. Some may say that it's in the OT so it doesn't pertain to us...yet they will abstain from blood because of what was commanded in the OT...I was one of those people. The OT law, of Moses, was done away with, but these commands were not part of that law.
There is also the account of Onan and Tamar (Gen. 38:6-10) in which Onan was killed by GOD for "spilling his seed"....ie: bc.
There is more, but my littlest blessing is now awake and it is difficult to type one handed so I will end this...
For me, I see it as being a command from GOD to not stop our bodies from having children. Could this be considered a personal conviction? I don't know...only God truly does.
btw...I will say again that I trust GOD in this matter. I trust HIM to have made my body and my babies bodies strong to get through labor and birth...I do believe also that we can do things to our bodies over time that may make our bodies not work as they were meant to, but if we look to GOD's word on the matter of diet, much information is given to us as to what is created by GOD to be best for us and will help our bodies be just as they were created, strong, haelthy, and resilient....but that's a whole other thread

In HIM,
Tina