Excellent!
Removing the top clevis to check the pivoting arm and rack yoke pin smoothness is simple and effective and lets you readily see and feel what's causing trouble. My Listeroid 6/1 had big problems there. I had to readjust the angles and finally smooth the rack yoke pin and bush the pivoting arm hole that it slides in. The yoke bit was very badly machined, very rough pin would tilt in the oversized hole and bind.
The linkage length adjustment section was also very helpful. I'm gong to check my 6/1 via this method.
Thanks, 38AC!