if you snowboard, you want this. this kit has everything to keep your ride up and running! ive used mine for the last 2 years, and everything has help up for me tuning and waxing at least 5 boards a week, and doing heavy tune jobs too from me and my friends riding street stuff. i would suggest upgrading your wax, personally i like the one ball jay biodegradable soy wax, but thats just me.
anyways, get this kit, it does it all, and at a affordable price. it makes your board like new
its fine for 40s, but this thing is way too soft for 60s or 70s, youll have trouble keeping an edge and popping or carving into a spin with the speed youll need to clear that sized jump. go with a stairmaster extreme!
it doesnt snap back because of the nylon tie down, if you clipped the bungee down directly to your rail, it would get in the way, if you use a rope tied between the bungee and rail, and the handle to the side when you have good speed, youll be fine.
id recommend detuning any board thats ridden in park for about 6-8 inches in the very middle of the edge, as if you were doing a perfect boardslide, and doing so doesnt effect your edge hold much at all, but helps alot doing gap to boards and gap to lips
but this board sounds like itll do everything you need and more!