Actually, you almost got it right, the pots needs to be cleaned
with a good lubricants/cleaner
try Radio Shack part #64-4315
Insert the nozzle inside the pots port, and while spraying, turn
your wheel right/left often, that's going to cure your problem.
Don't forget to do the same to the pedals potentiometer.
Yes, it can be done, i've built one (am i alone?), i use it for GP2 (i
think it's the only sims now that can use it) check this out how to do
it on my website
Everything is explained loud and clear at (direct link)
http://infoweb.magi.com/~ericcote/t2&clutch.html
Also if you want to add gear change button mounted on steering
wheel (keep your hand on wheel, and trigger gears with fingers)
try this:
http://infoweb.magi.com/~ericcote/t2&gear.html
If you like GP2, you may be interested of what i've done:
setup guide,telemetry guide,trackguide, RACE & QUAL
SETUPS, and more..
at my main webpage (linking to all above)
http://infoweb.magi.com/~ericcote/gp2menu.html
BTW, i've spoke to technical department at Thrustmaster, i've
explained what i've done (modification), and i've asked them
to consider this as future plan for there GT wheel as either
EASY ADD-ON or already hooked-up, and they reply that
they would consider this in a serious way.
SPY's GP2 WEBSITE http://infoweb.magi.com/~ericcote/gp2menu.html