Hi Brett
Each S/S worm cost USD95 and the brass 64-teeth transfer gears/spur gear set (I did not show the pix of the spur gear - 3 gears in a set) cost USD145 plus abt USD40 for USPS priority mail
Jimm Egger is good to deal with and very professional - he produces the stuff only on order so you will have to wait aro 4 weeks - BTW he does not produce the brass ring gear for the EQ6, just the CNC machined s/s worm and transfer gear/spur gear sets
The rationale behind the gear sets with more teeth is that the resolution/turn would be smoother and note the gear with s/s bolt/nut, it goes thru a bearing that the transfer gear is set with rather than just the large hex nut - so no movement/wobbles from that gear that drives the spur gear that is attached to the worm
When I did my first hypertune, I knew nothing about astronomy (I still don't!
) but I did get a lot of info from the web and my source of guidance was from here:
http://beevo.com/Components.htm (his website is not working well, undergoing revamp I think) and I was puzzled about how to mesh the worm to the worm gear and found documents on how to do it all (see attached) and it was not very difficult as long as you understand what is required and if a noob like me can do it, then all you guys will take this as a walk in the park!
Well I am going to do my next one on the newer model EQ6Pro soon
HTH
Cheers
Bill