I had a nice Master Airscrew 14" prop I wanted to use on my Saito 80 4s. I apparently used the wrong sized reamer and wound up with a 'sloppy' fit at the rear of the prop. I bought a Top Flite wood-that's all the local shop had- and tried it. The hub is very small compared to the Master, plus a very lightweight prop by comparison. I took a piece of K & S brass tube I had that just fit the engine shaft, cut off a piece about 1/4" long and 'press' fit it into the rear of the Master prop-a perfect fit! The Master has a very meaty hub, and provides more backing for the Higley brass safety nut I use.