Shaft Length

Are you going to run Green Axle bearings (the sealed ball bearing type) or stock adjustable preload tapered cone/cup? The 5x4.5 backing plated will change things too.

I didn't even know they sold cut to length.
So they give you 4 inches of spline to work with and you just chop saw the excess off? Cool! Sounds like a huge stress riser if its not supported though. Not sure what percentage of engagement do stocker have?