It wasn't mine, I did the conversion for a Canadian member of our local club. Unfortunately, the engine came with an aluminum collet & would not hold ignition timing. I think I set the timing at 34*.

This seems to be a hit or miss thing as some have had the same issue with the FA-115 yet mine has a brass collet just like my FA-91S.

I did verify with Horizon that the replacement prop hub/collets for the FA-19S/100 & FA-115/125 are indeed bras as pictured on their site. They even went out & pulled stock to verify after I posted some rather critical feedback on here when I was brushed off by their online "chat" minion..