I have a DLE-30 engine on aWild Hare Hobby baby Extra 260. I bought a MPI 3" spinner from Troy Built Models that had a 6mm prop nut that a 4mmspinner bolt attaches to. The problem is the hole in the propelor shaft of the DLE-30 is 5mm and they don't make a 5mm prop nut. I could just put a 5mm bolt thru the end of thespinner and bolt it down, but the head of the bolt won't fit into the recessed end on the spinner. Any suggestions on how anyone has mounted a spinner on the DLE-30.