astro774,
Thanks for the link - I found this myself while searching around, but I'm afraid I am none the wiser - while the "Instruction Manual for Telescopes With EQ1 & EQ2 Mount"
http://skywatcher.com/downloads/Inst...AL_EQ1and2.pdf (and the manuals for the EQ1 and EQ2 motor drives) give instructions for both mount types, I haven't been able to find out the definitive difference between the two models (e.g. shaft diameter, worm gear ratio, etc), so it doesn't actually answer my question, I'm afraid.
The only difference I could spot between the manuals for the EQ1 and EQ2 motor drives is that the EQ1 seems to clamp onto the main altitude axis pivot pin, while on the EQ2 it screws to the RA body. Is
THIS perhaps the key difference? My mount appears to have a screw hole on each side of the RA body (I'll take a closer look tonight) - does this mean I have an EQ2, perhaps?