A good tip I had - apologies if obvious - leave one bolt partially
unscrewed on the shaft. When I removed my prop I tightened the prop-
removal tool (borrowed from the guy who was going to tune the prop).
Tightened - no joy. Sat back, scratched my head, tightened even more,
still nothing. While I was pondering my next steps - a few minutes
later - there was a pop and crash, as the removal tool clattered to
the ground - but the prop stayed on the shaft, held by that last
bolt.....