Need a 3 blade for a 21 Spectra 15 or 16 pitch 1 in. shaft I'm thinking 11 to 11 1/2 diameter. Currently has a 10 7/8 3 Blade 15 with 32 gears and a Blown 572. Runs pretty good with whats on it, pulls hard but think I need more diameter to pull the motor down. Hits 6800 + rpm's like its on ice. Just ordered a 6000 rpm chip and need a spare prop. Anything for sale ??? Any suggestions on what to buy ??? Paging Stevo !!!!