We replaced the Michigan 4 blade propellers on our 42 Open this week with Veem Interceptor 5 blades. There is noticeably less vibration when running and we picked up .8-1kt at cruise. However with 3/4 fuel, full water and the tender, the boat was making 2315 rpms at WOT when the engines are rated at 2350, so we're a little over propped. They're working on getting me the different Interceptor Strips which should fix the problem. On Veem's site, it says they can be changed in the water. Does anyone here have experience or suggestions with having a diver do it vs a short haul of the boat? My mechanic is willing to dive, however if its considerably easier to do on the hard then I'll go that route. Appreciate the suggestions..