I ended up ordering a prebent Z3M kit from Understeer once they came back in stock and pulled the Z4M lever last night to do a true comparison:



I thought the Z3M would be taller, but it falls right in the middle. I see why it's such a popular upgrade.

Going to try running my modified BMWP lever for a bit and see how I like it. The Z4M lever was perfect once I swapped on a taller, heavier knob, but I just miss the feel of the ZHP knob too much.