RE: Prop coming loose
What is the torque value for the 2 c engine?
Also yes I agree that it's very rare for me to use LOC/tight on anything.
Ever see those nuts that have the 4 punch marks on one side?
I don't see them much anymore but those and the nut with the nylon collar are accepted by FAA as long as you have 5 threads exposed after the proper torque.
Vegas/