Hi Mark
I have used the GPCNV-TAK Guide Port Converter for Takahashi Mounts for my Takahashi EM200 purchased via AEC some 5 or 6 years ago.
I purchased the following parts:
GPCNV-TAK: plugs into the EM200 control box on the mount body.
GPUSB: USB Guide Port Interface – plugs into a USB2 port on my Notebook computer.
GPFC-7: Guide Port Flat Cable, 7 feet: connects GPCNV-TAK to GPUSB. Note that this is not a standard telephone cable – I think it may be “reversed” but if you buy the one from Shoestring, it should work.
Cheers
Dennis