Ok, I've been sailing with conventional weed fins for a while now, but don't feel really comfortable on the big bear always at say 36+ kts. Used a C3 Slingshot 23 over winter (thanks Bender) and LOVED it. Felt in control and like I could really go for it. Decided I still wanted a bit of rake for weed, so decided the Vector Weed Speed was probably what I needed. I like the short wide concept. Now to confuse matters I have recently tried the more radical Maui Ultra Fin Delta weedy (thanks Fangy) and liked that too, but I wouldn't buy one over the Vector just to get into weedier/shallower water.
So assuming all other elements are constant (mug sailer, 5.8m sail, 55cm wide board, fairly flat water), comparing a 23cm Vector with a 18cm MUF, any advice specifically on
1/ relative ability to hit 40kts
2/ relative stability at those speeds - this is probably most important as I think the fear factor is my biggest issue ATM