re metro vss, thecheese429 JUST got a gear sensor working for a vss, you might look in that direction if the reed switch proves challenging. there are existing buffers/tweaks for noisy reed switches, so not sure you want to "fix" that till you see if it is broken.
here is the solid state vss thread:
http://ecomodder.com/forum/showthrea...tml#post178770