I purchased this mount couple of years ago at Bintel, from cash-carry pile (they are not doing this any more).
It needed some rework on worm gear (aluminium.. there was a lot of backlash, and the whole thing was not centric, indicating very bad manufacturing process) .
See here:
http://www.iceinspace.com.au/forum/s...&highlight=EQ3
At the end, it was a good buy (but much cheaper than what they ask on ebay) and I am using it for up to 300mm FL for wide field.
In my opinion, this mechanic is not suitable for more that 2-3kg max of equipment.