Hi Dennis,

I have quite a few different units, but the best collet that I have is the one from Axi. It is very well made, and it never gets even slightly loose. If you have read my other posts, you will know that I fiddle........a lot! I have a few cheaper collet units and the can't take my abuse for long. Someone stated on another post (I think it was Kim Doherty) that if the collect unit is suspect..........chuck it out. That's good advice.

The bigger MVVS motors like the 6,5/910 come with a prop drive unit that fixes to the shaft with 2 grub screws. The motor shaft also has a small flat ground into it, and I've had no problems with that. MVVS is made in the Czech Republic..............same as Axi.

Spinners are another story. The Great Planes plastic spinners can wobble if not fitted properly. The backplates can also bend if the cut-outs in the front section are touching the prop blades. When you tighten the cone then the back plate can warp, causing the spinner to wiggle a bit. The neat thing about electric (one more good point for the cause!) is that there is virtually no vibration from the motor, so any slight vibration from the prop or spinner can be heard, or felt. It makes things easier to balance if you know where the vibration is coming from.

Guys,

The local hobby shop have a large E-Flite 5mm drive that I bought. It is a very hefty unit, the angle on the collet is deeper and the drive washer is heavy duty. I put it on the motor yesterday and it fits very nice with no wobble at all. Its a little heavier than the first one but it eliminates the need for a spacer washer to get the proper clearance for the spinner on my ship. This should do the job.

Best,              DennisT