A problem I did have after the ratchet column modification was the pawl began "digging into" the ratchet at the edge of the milled locations. I broke the edges there but the cylinder was still hard to turn. This did not seem to be noticeable at first after the milling job.
I had to remove the pawl and file and stone the upper right corner. Cylinder rotation is still not as smooth and easy as it was before the modification but is does not seem to be suffering from pawl dig in.