Hey guys I purchased a Dave Brown 2" aluminum spinner. Went to put it on my plane which has a OS 46 with the 1/4 28 thread. Had to buy the adapter nut. So I put that on. My question is with the backer plate prop washer and adapter when I put the spinner on it doesn't quite make contact with the backer plate. Does this make much differece? Does it have to make full contact with the back plate?