Thanks for your input, Dirk. You often give useful advice, albeit in your "own style" but you're wide of the mark today.
Steel Developments are useful and helpful, but do a search on them here and it's surprising how many problems people have encountered - eg: vibrating propellor and wrong prop supplied.
I may get some feedback from them as "Mr Charter Co" is intending to read them the riot act. I hardly think they will be saying "Oh yes we cocked up big-time twice in a row aren't we stupid".
Don't know what you mean about cheap prop to use in a "high perf" installation
- I was about to buy a new prop identical to the s/h one I bought, and chose it on the basis of recommendation and the claims from Steel Developments that the Solas Titan is a much better unit than the Yamaha prop.
Pilot error? Always possible for any of us, apart from you of course, Dirk. You seem to have pushed a few buttons with my buddies here, but I share your respect of the excellent RYA courses available. And I know that from attending those courses and learning.
Yes, even you are never too old to learn, Dirk, eh?