dr wogz - how did you end up securing the prop? i'm having to buy a nut that will screw through the prop and the locking nut screws within the screw. it's from tower and costs a little more but i think well worth the safety.

http://www2.towerhobbies.com/cgi-bin...?&I=LXCT61&P=7

it's made for the flat twins but it should fit.

wish me luck!