My very limited experience with the 201XT and Losmandy is that it will only correct one axis at a time. It needs standard CCD guider port connections and a floating ground. The ST4 is certainly preferred to a 201XT!
See this link for an example in practice:
http://pw1.netcom.com/~ahighe/astrosetup.html
See this link for an example in practice:
http://pw1.netcom.com/~ahighe/astrosetup.html
