RE: Spinner question
Yeah, that mix probably does look a bit silly. Most prop nuts, or spinner nuts, I've seen are really designed to replace the nut on a 2 stroke engine. They should not be used to replace the nut/lock nut combination on a four stroke. The double nut setup is there for safety becasue a backfire on a 4S can eject the prop. Double nut greatly reduces the risk the prop will leave the shaft. You did the right thing by keeping the double nuts, but then any spinner nut will look silly at the end of all that. Your best bet to improve looks is to use a spinner (cone and backplate.) Cheers