H,
I used an STL with the 12" ACF and i think it worked well, but with the 12" you can unscrew the 3.25" threat at the back of the rear cell and replace it with a larger aperture hole, or put a optec focuser on the back which is what i did and that also opens up the back a little. Im not sure if the 10" can have the rear thread unscrewed to open it up, having said that, it may still work with the stock standard back on the scope.
Josh
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