Klsmurf: I've had good luck with the two piece taper type (forget official name) You get them for the
shaft size, and as you tighten the squeeze bolts, the inner is squeezed onto the shaft. Removal is by
jacking bolts.
In theory, if the fit was poor, or not enough squeeze was put on, they could slip, but on a conventional
HAWT, the blade assembly would only push on further, not fall off.
Only a thought, but I've had good luck with them in numerous applications w/ lots of vibrations etc.
Good luck