Hey CDN_S4: Creative use of U-bolts to attach the jack to your rack!
I have a tip for you about the way you mounted your hi-lift, for I have my hi-lift mounted in the same orientation (albeit with different hardware).
The part of the tongue of the jack is cast in such a way so that it will collect water and rust when the tongue points downward. To reduce the chance for pooled water to rust the jack and eventually splash rusty water drips down the side of my rear window and quarter panel, I disassembled my jack and drilled one 3/16" hole in the center of each of the cavities that can collect water, then painted the bare metal where I drilled the holes. You can optionally spray some plasti-dip or bedliner on the tongue surfaces which won't interfere with jack operation.
I also glued a piece of heavy foam rubber on the bottom of the tongue where it would bang into the foot when the jack is all the way down. This helps to reduce rattling of the foot while driving.