Backlash
I've read anywhere between 0.008-0.012. Not sure if tight or loose is better for racing

Pinion Depth
Does everyone setup their pinion depth for a wear pattern in the middle of the gear, or do you favor the heel or toe of the gear?

Pinion Drag
I've seen anywhere between 16-24 in-lbs on a new bearing... High side or low side of that range??