Folks

Had my first club race with my new used NT48. Handles well but I am having clutch issues. I have one of Ryan's Worlds engines that is a bit tight.

Using a Losi clutch. Clutch nut loosened and ate the collet.
Have to use a heat gun to warm engine even in AZ so the OFNA starter box will turn the motor over.
Any thoughts as to the cause and cure?
I do use set up Locktite and a fair amount of hand strength.

Is the Tekno clutch better? Or just really tighten the clutch nut?

Thank you