Unity is pretty awesome - I would still apreciate if if you cold PM me the Hover algorithm your using - mine's pretty much:
Force Applied = ((targetHover - hoverHeight) * HoverCons)-(Damping / (HoverHeight - PrevHoverHeight))

This is applied at for points of the AG-Craft. It's good - but the Craft hops around like a Bunny Rabit at easter , fixxed on acid! - this is only after a jump mind. You have to stop, to get it to flatten out.

And you don't need to simulate Air-resitence - thats what drag is