What did you do exactly to get the side load (I'm assuming that's what you mean by resistance) against the ring gear to get a good read on the pattern?
I wedged a prybar between the ring gear and 3rd member and leaned on it a bit. Most important was not to use too much of that marking compound. It's a bit tricky
If WL ever broke in a gear set, I never knew it. I've seen finish a setup, pull the car on the trailer, tie it down and go racin the next day. And win.
Just finished the break in period, works great. Still need to do a full throttle hit. Definitely gunna be a spill the beer moment, 3.91 feels crazy compared to 3.23