We bought a 3 blade
FOF for InsatiableII about 5.5years ago, and have found it to be a first class bit of kit. Good performance forward, ok in reverse, no worries with folding, etc, and after about 1500 hours useage there is no slop whatsoever in the blades or gears.
We have again found that the button anode on the hub seems to be water
soluble... very short lifetime. Shaft zinc lasts the usual 6-12 months, button about 2-3. Had the same issues with a feathering prop on Insatiable I, and suspect that it has to do with turbulence in the hub area, but no data to really support that hypothesis.
HOpe that this helps...
Jim and Ann s/v Insatiable II lying Gladstone Qld Oz
PS Have been making our own button zincs... cost about 5 AU$ instead of 40+ from FOF