[sdiy] XY controller build?

[Joe]

Hello, I am considering building an xy controller. What I'd really like
to do is modify a trs-80 joystick. It is 5 volts and that is what I need
but I am betting the sprung return to neutral would defeat the
usefullness. Has anyone ever tried this?
 Also, as an alternative I found Ken Stone has boards for sale, but I
couldn't find any other kit? Anyone know of another?
 Thanks. Joe Frey.