RE: 4d foamy???
the vpp setups i've flown are setup like helies with throttle and pitch curves...
Where neutral would be at mid throttle...50% or so throttle, then when you go up its x degress positive pitch and full throttle, and all the way down would be 100% throttle and x degrees neagative pitch...
You would have multiple curves, a linear one for landing (0 pitch + 0 throttle to 100 throttle and full positive pitch...) and you would have that on a switch, so when its time to land (or takeoff if you roll out) you switch to the linear curve...