I'm with you, I use CPE all the time, it is great stuff. Im just surprised that I buy Ultimaker CPE and the dimensional accuracy of prints is off over .010 in. sometimes more, and this is their filament. I did do a test print with abs with engineering mode and it was much better, but I have a hard time with abs warping with the prints I do, until my air manager shows up...
A separate forum for this exact issue would be great.
(as a note, I do find that CPE prints better accuracy at .15 layer height with all speeds set to 30)