I was running ARC M10 Medium (28mm height) and with the check rest bottomed out it was just right, but then I bought the Wiebad cheek pad and I had to smash my face down to get a decent sight picture. I remedied that by getting the ARC M10 QD-L mount at 1.38" high and that works very well for my setup.
These pics are with the M10 QD-L 1.38", this is with 0 MOA as my rail already has 20 MOA built in.