[secant0give]

Thanks SRL !!
I'll have a look and see if I can find a round prop nut in bunch of parts,
I'm guessing that this for better air flow for cooling? I'm not sure how well balanced the spinner is on my model it seems to have a bit of a vibration about it. could be the prop as well.

I gave it a bit of a test fly here at work this morning. I must say I was very disiplined with the use of the throttle, It's only a small field here.
I reckon the recomended 30 mm back from the LE at the wing root is a little far forward for the C of G. I only had just enough elevator to make it flair for landing. Also with the c of G in this position and trimmed for level flight at just under a half throttle, It would up noticably when the juice was poured on.

I must say it is great fun to fly tho' I've made some adjustements to the throws and expo from the recomended settings and shifted the c of G about 3mm back and I'll give it another flight this arvo if it's not too windy.