Considering that you are busy let me try to simplfy the topic.That may save your time.
1-Tectonics talon fins or any better suggestion that works in flatwater conditions with Futura better + fin size for F 111/F133
2-NP Hellcat 7,2m. Is it the equivalent of 7,5 V8 or 8,0 V8 or 8,5 V8 or such a comparison make no sense?
I guess it is a little bit simplified.
Ps:Remi send a message that refers to C3 venon I read the post about C3 venon befor submit my question but there was not sufficient detail.Especially any size indication.