I was thinking of changing the 2 blade,to a 3 blade on my 1982 Hunter 27. I'm not realy looking for a big performance change. I was told it would run a little smoother and backup a little straighter. I'm just wondering if it's worth it, and if anyone would know what pitch and size I would need for this boat? My engine is 1gm 6.5 hp.Thanks,Don