Prop Shaft

[Propless]

Yes, if everything stays linear.
ANY side load will ruin that.

Gun drill that shaft and now it's stronger torsionally and lighter, freeing up more hp.

That's interesting, and you made me go take a better look at my parts. I hadn't noticed it before (never actually looked) but the motor to V-drive shaft (1 3/8") is hollowed out. Its got a 7/8" hole down the center. I guess they really wanted to get every last 10th of a hp they could out of this thing.