As part of an engineering project for school, I've decided to try to design a set of landing gear that can be used for planes, helis, and multirotors designed for beginners or early intermediate pilots. I have ~2 years experience in RC, and I would like to get opinions from those with more time in the hobby as to the design of this gear. What would you like to see in a set of gear that can be field-swapped across airframes?