Thanks for the feedback and sorry for the late reply (I've just finished a week of night shifts)
Antony thanks for the generous offer but if I go down the hydrofoil path I'll get ones designed for my motor, thanks again.
I've been running smart tabs. Had a look at them yesterday and realised the shocks had broken. I've replaced them and going to go out tomorrow to give them a run. 1.5 m swell with 6 second period should give me some idea if it's improved.
Rick I have a 4 blade 17 solas prop so I think I'm on the right path there. I've only had a tiller steer tinny up to 3 years ago so still learning.
Plethora I've had a lot of people tell me exactly what you said...that's why I'm a bit confused.
John thanks for the video it gives me a better idea of how to use them properly, Quick question I think both of the boats you mentioned carry the v hull through to the back where mine flattens out. Does this make a difference to maintaining plane speed in slop?