Try flying 2cycles instead.

You don't have to tighten the spinner down so tightly it breaks the backplate.

You don't have to tighten the spinner down overly tight at all. Matter of fact, tightening the spinner cone has little or no effect on how tightly the backplate and prop are held to the thrust washer. So even if you are scared of your 4cycles backfiring everything loose, don't panic and overtighten the spinner cone hold-down screws.