I think I see what you are saying. I want to eliminate tooth length variation but could see where that slight looseness could be turned to your advantage.I got one of those clone grinders about 9 months ago. Then got some Molemab wheels. Works fine, once you and it get sorted out. The OEM wheels were a bit eccentric, the Molemab much better.
There's a bit of play in the mechanism, that gives you flexibility as to where to contact the teeth. Little more, little less, as required. Lets you accomodate little differences in tooth length. Push a little left, a little right as required.
Works great for $100, enormously better than the HF cheapie.
Jeez, I have gone from looking at some of the most expensive to considering the cheapest ones.
I am still unclear which way to go. Russ