I'm pretty sure I've read that people have melted the diaphragm before when trying to attach wires to the pads. I'm not exactly going to test it out myself Any driver transplants that I've done, I've always left a bit of the original wire attached and just soldered to those.
I mean, it's just a plastic after all. I'm very surprised that it didn't melt anything... or if it did, it was too small to be noticeable.
That's where I'd make a glob on some paper and take a toothpick or needle to do the fine work.
Edited by Armaegis - 7/10/13 at 6:47pm