Well after much reading and wondering I fitted a set to my Redbay 7.4(165Hp diesel inboard) on Saturday. The reason was that it is a shite to get onto the plane as you have to get to about 1500rpm before the turbo kicks in, after that its no prob. Getting to 1500rpm can be a big pain in the arse, dosent matter how you trim her you have to go WoT and turn from side to side, then 1500rpm and whey hey.
So I thought well what the hell, lifted the boat on Friday night and fitted a set on Saturday. I couldnt get actual Doel Fins locally so fitted a set of Lazarus?? Hydros at the pricey sum of £22.50.
Launched again on Saturday night and immediatly noticed a difference, quicker to get up to 1500rpm and much much better on the trim.
I can now actually trim her the way I think you should be able to i.e bow up/down depending on conditions.
I have yet to try her in a rough sea to see if there is any difference but up to now they have worked for me
I was also out on a Carson 7m fitted with a 300hp Volvo Kad42, what a boat