I've got the FLT91 with the 68III flattener. I had an ASI6200MM-P on it, but changed it to the 2600MC-P. Re: slight vignetting in the corners. Moving the 6200 to the UltraCat 108 with a larger image circle as soon as it comes out. I tried using the 6200 with an ASIair+ and it would time out on autofocus and alignment. The 120 meg files are more than the ASIair can handle. Also while the image was processing and displaying to screen, the AA+ would disconnect and reconnect. I also have the 6AIII reducer, but no longer use it for several reasons. One being that once the image train is working, tilt adjusted and backfocus set, I don't dink with it. I currently have an ASI2600MC-P on it and love it. You can't go wrong with the ZWO AM5n mount. I have the AM5 and the ease of use is unbeatable, although PA can be a little unfriendly when cinching it down. It tends to move, so technique is key to success. I since have moved the FLT91 to a WarpAstron WD-20 mount and run NINA on a Ryzen 7, scope mounted mini PC. It is OnStep based, so unless you have a lot of patience getting use to the intricacies of that mount, I wouldn't recommend it. Having said that, I hated it for 2 months and now I love it. Kudos on the ZWO focuser. I found that I was mostly out of focus when relying on my poor vision and a Bahtinov mask. Now, every scope I have gets the auto focus. A rotator is really nice. I have the Pegasus on my FLT91, but plan on ordering a couple of the new ZWO CAAs for other scopes running ASIair+. Pegasus has some nice power and USB hub solutions and I use the UPBv3 for the FLT91. Filter wheels keep you from having to handle your expensive filters. I tried the filter drawer path and dropped a filter in the dirt one night. Ruined it and have gone filter wheel on all my scopes. Finally, don't be shy… get that credit card out and buy, buy, buy.
