Hi Eric,

I have the CEM40 and would emphasise the need to tighten the alignment locking hex bolts. Do this after you have finished the adjustments but while the view is still refreshing. As you tighten the bolts do this in increments on either side rather than tightening up all at once on one side as you will see a shift in the polar alignment. Slow incremental tightening on the alt and az bolt should ensure that this can be excluded from the reasons that your mount is not guiding as well. You need to tighten the bolts quite a bit to ensure no movement with this mount.

I am using an OAG with a F6 refractor but your C9.25 is much longer than that so I would stick to OAG for guiding. The ipolar on the CEM40 is OK to polar align with but I have never used it as such and always do PA on the main scope. As Andrew says, the longer FL of the C9.25 may be an issue with PA as well. In which case try the ipolar .

I routinely get 0.5-0.7 with the CEM40 using the EKOS internal guider . Don't forget to turn off PEC in the indi mount panel and handbox(if you use it) as this will interfere with guiding.

Hope this helps

Mike

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