Here is a pic of my Bf with trevorakm1's tracks, and my sweet running 56' 5.5 johnny. Swam up river/brook yesterday total water time about 2 hours. The short shaft works perfect to clear the shallows and underwater logs........yet rarely cavitates. I climb up over 2' high damns with motor running at idle in gear, and drop into the deep on the other side and throttle johhny up and keep going. Freaking amazing combo. Goes about walking speed with the tracks stopped/engine off.