Looks good!
Im just spitballin, but do you think it could still put a bit of pressure onto the prop mounts?
Do you think by having a sleeve design that interlocks with the prop mount but still slides down over the motor housing would offer a little more protection against lateral forces?
I imagine as its in a bag and there is potentially some lateral movement you are now putting direct pressure onto the prop mounts, where if its slid/sleeved down over the motor housing you are then spreading the load a little?
Just thinking out loud, ya know.