I am interested in upgrading to a folding prop. I have a 3 blade 16"X? RH prop with a Universal M25 (1986) the three blade works great, but I believe it is producing a lot of drag. It appears that the standard 3 blade prop is a 15 X 9. I was surprised that I had a 16". I am looking for imput. I have heard that the flexofold is a good prop and a good value. I prefer the folding prop design, I sail the Maine coast which has many lobster pots. Any input on props and size?