Sorry, I hesitated to respond because I have no experience with Rescue Remedy.
But, I am an experienced pumper. I use both the Medela Pump In Style and the Avent Isis.
With the PIS I have no trouble pumping, this morning I got 5 oz. out with no trouble, or even any breast compressions. I didn't have to think about the baby or even look at his picture.
With the Isis hand pump, it's a different story. I have a real hard time having letdown with that one. I guess the pumping action isn't strong enough. So, I have to visualize waterfalls, imagine the letdown feeling, sometimes I visualize pumping with my PIS because I can see the milk spraying out when I use it, so it helps me get in touch with that feeling.
Anyway, those are the things that I do to help letdown happen.Let down hints