I designed this object because I had problems with the props hitting the ground at takeoff, since a under sling battery. The object also might help to reduce some vibrations.
It will lift the end of your quad arms by 12mm, which is 2mm more than most neoprene/3m pads. Make sure to not tighten the motor screws too hard.
My succession is, to print this in TPU to not destroy it on a hard landing.
Printed in Semiflex, infill was chosen, so that there is some kind of additional support within the landing pads. Depending on your slicer, this may vary.