I just purchased an IEEQ45 PRO mount but have yet to put it through its paces. I build mounts and drives so know what works well and what doesn't although all of my mounts are non-go-to. This is the first go-to mount for me. A few things I really liked about it right out of the gate is the fact that the worms are spring loaded. This eliminates backlash if the worms and gears mesh properly with changes in temperature and any eccentricities in the machining. The wedge design is another big plus for dampening vibrations. It was smaller than I expected overall for the weight it is stated to be able to carry but it handles my 6 inch f/11 refractor well enough. The controller is the 8407 + and it works very well with what I have been able to tell so far. I liked the fact that it can be heated in cold weather as I live in the north (Alaska).
Tracking and slewing are pretty quiet. I was able to get things centered very well at 66 inches focal length and 33 X with rough alignment and very good centering with 3 star alignment even though the mounts legs (tripod) were in soft thawing ground and the scope was shifting the weight around as it moved from one side to the other. Tracking appears to be very good although I have not had it doing any imaging yet -( waiting for the weather ).
It is easy to polar align with the polar scope and I have gotten it to read an error of 9 arc minutes in DEC. with about the same in R.A. just using the polar scope.
As soon as I get a chance to do some imaging with it I'll report some more. I guide manually instead of auto-guiding so I'll be able to see exactly how the periodic error appears in action while doing shots with and without periodic error correction applied.
Here is an edited shot with the 6 inch refractor on it. Manual guiding ,by the way, is a piece of cake. All you do is substitute your eye for the guiding camera and push a few buttons once in a while.
If you really want to make the mount even more stable than it comes just hang a heavy weight below the center of the tripod and even add some vibration dampeners to the feet and you will have a very well dampened and stable system. I bought this mount specifically for the 6 inch refractor to do imaging and it appears it will do the job very well - so far even without the dampening just mentioned.
The stepper motors throw the 6 inch around with ease and are very smooth. The belt drive system really reduces noise as well as periodic error. If I were to build a small mount it would be a lot like this one.
Edited by jimegger, 09 April 2015 - 10:17 PM.