Hello,
On two sets of pulleys you can make huge reductions, but also small reductions, you have to make an average so that the ratio is not excessive either!
I have seen for years that both in the world of HIFI audio and in astronomy many people nitpick and look for the little beast to the point that he changes equipment every six months because they are looking for a gral they impose themselves and they enter a circle of hellish galley!
The most important thing on an equatorial mount is mechanics, and this from the beginning of the instruments!
For example, when we see that an equatorial mount like the AZEQ5 has been mounted with an aluminum gear wheel and a steel worm, mechanically these metals are incompatible, normally we put a bronze or brass gear, and a stainless steel or hard steel worm gear, when the Chinese start to think about our quality may not be !!!
When the loads advertised on the frames make me laugh, when we announce 15 or 30kg it is better to put than half to be quiet!
To grease the frames, evening lithium grease, or tallow!
Regards,
Pierre