I have two tips worth sharing. The first is to use mono filament line to tie servo extensions to the servo lead. Just loop a small piece of the fishing line between the wires and tie the line so it pulls the connectors together.
The second tip is for when you tighten some props against plastic spinners, I've had this problem with APC props where the spinner backplate will turn when tightening the prop nut making it frustrating to get the stops lined up with the side of the prop. I make up some discs of 120 grit sandpaper (approx 1" dia) and glue them paper to paper then place the disc between the prop and backplate.
This works for me.


Happy Flying:
Tom