Congratulations on you mastery of this complicated system. You are VERY lucky boaterbob and harley are here.
Here is a current eBay auction for your Gear box, switch and motor which ends 22 Aug. No guarantee parts are any better than what you have.
http://www.skweezer.com/s.aspx/-/cgi...ts_Accessories
"will replace the limit switch with the one I have on order from Thunderbird Ranch. "
[ Believe John Traxler just sells aftermarket electronic unit whch replaces factory set-up ]
"When I take the motor/reservoir out, what size caps should I get to keep the system from leaking?
[ NAPA has brass plugs but don't know size. Hydraulic line solonoids should block fluid flow thru disconneced lines. . Best to have a towel under any line connections as you open them. ]
Poor man's cure for play in rotary switch and/or gear box:
LIGHTLY push on flip lid with one finger.
Art