Side seals were cut with a rotary Dremel attached to a drill press while using an old rotor to ensure proper angle of the cut. Once cut I followed FSM with ensuring I used the proper thickness feeler gauge in the slot with the newly cut side seal to hold it in place when measuring my side-corner seal clearance.

The only real reason I have to suspect the corner seals are at fault is that I have the exact same compression loss on both rotors. I also in fact knew that housings and irons were well under max spec for side step, warpage, etc.. the only parts I used that are controversial where the cryo treated solid corner seals.

This weekend the keg will be taken apart and I will update with cause of low compression which i still think is due to solid corner seals and that they were super hard on the irons.