I have the EM200 Temma II which has GoTo and an auto guider socket. I know of a local guy who used to own an EM200 USD III which just had the auto guider socket but no GoTo.
I assume the EM200B just has the plain hand controller with RA and DEC buttons, no GoTo and no auto guider socket? If that is the case, I’d e-mail
Art at Takahashi America to see if the EM200B can be upgraded to a Temma II mount to provide both GoTo and auto guiding capability.
Cheers
Dennis
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