There is normally nothing inherently wrong with spinners that have plastic backplates.

I've used them in models ranging in size from 1.40 down to small electrics without problems.

Many different companies manufacture them as well.

Bubbles SHOULD NEVER be present, as you've implied, they will indeed weekend the plastic and will likely cause problems.

It sounds like there is a problem that run of them.


That said, some people do use the included CMPro P-51 and the BF109 spinners with success as noted in the Warbirds threads.

Anyone is best off inspecting them and making sure that when installed there is no strain on the spinner.