So I trawled through the forums and there are a few posts about applying loctite to the prop screws, both for and against.
I was trying to avoid doing this just for ease. When going through my pre-flight checklist today both of the CW props came off... One just from the loosening of the nut/bolt combo, the other the entire screw came off the motor.
Luckily, I was cautious and no-one was around, but it was quite the sight to see the props fly up into the air about 20 metres and then slowly come back down.
I went to my local hardware store and they suggested this - http://www.loctite.com.au/cps/rde/xchg/henkel_aue/hs.xsl/3320_AUE_HTML.htm?iname=Loctite%C2%AE+243+Medium+Strength+Threadlocker&countryCode=aue&BU=industrial&parentredDotUID=productfinder&redDotUID=000001G2QU
Is loctite the answer? Have other people found another way?
All the normal checks went ok, electronics were great, beautiful sunny day and everything seemed to want it to happen... Aside from the props coming off - minor thing. (;