Long storey short I have shaped a few surfboards and they have all worked as intended and shaped 1 surfboard for a mate for kiting and he likes it and it was a lot more aggressive in the sharpness of the rails and massive concave blah blah blah, it all went well:

Now I am starting to shape a mutant, surfboard thingy for kiting and want some ideas:

General idea:
Surfboard type construction (foam and glass with a really thick 15mm stringer)
Outline similar to a mako
Recessed deck like the axis surfboard kiteboards
Thruster at 1 end (5 fin setup)
Twin tip at the other
Pretty thinish with carbon fibre matting and Kevlar mat reinforcement
Paulownia timber veneer on the deck to get that old mixed with new flavour
Foot straps that have a lot of adjustment places

Here's where the advice comes in:
How much rocker do you think it will need?
How sharp should the rails at the rear/front be?
How much concave?

I have my ideas but want fresh ideas.

Some basic outline and recess deck photos below.

Oh size is 160 long x 42?ish wide and at the moment it's thick because I haven't started on the rocker yet. It'll take a while but the initial stage is thinking through the design.

I have seen many modern boards with elaborate designs of the TwinTip board ends. Some have wavy designs, some have more pronounced symmetrical horn looking ends.

Can any one explain the signiffcance of these? Is this just a marketing gimmick or do these different shapes actually have some merit over the flat / slightly curved ends?

What would be good characteristics for a wave oriented TT?

I am toying with making my own TT, except I reckon you would need to vacuum bag for min wt, and haven't done that before.

Mako King "knock-off" or is there a better recipe?

The Alkita type looks good? Many peoples out there shelled out for one like Cauncys'?