That’s all solid advice based upon a ton of experience. Just to make things more complicated, by the looks of your size and the dims of your boards, would I be correct in assuming that you surf “light on your feet”?
Would your style fit with glide, or do you want to still snap turns?
Since you are taking the time to make a COMPosite SANDwich, you could kill it on a board like Thrailkill describes, especially if you make it Ultra Light in weight. Being so light, you may be able to bring the length down a bit but keep the wider nose outline (parallel outline through the main part of the board) but maybe give the board finer rails, kinda like a shortboard. Maybe 6’10" to 7’4"???
My thinking comes from a day we were out riding longboards, and one of the guys says “wouldn’t it be cool to catch the wave with this longboard, then once under way, hit a button and have the board shrink down so I can hit the lip a few times”. I pictured big pieces of the board being jettisoned!!!
Anyways, you can make a board with low rocker through the middle of the waterline as you paddle and have quite a bit of tail rocker out the back. Once you catch a wave and an “opportunity” comes up (steep little section) you can shift your weight back, shed most of the wetted area and throw a sick turn.
Make the thing ridiculously light esp. in the front half. Your rails would be kinda shortboard-llike: the lower half (apex to tucked edge) would be tight like a shorty but the upper part would climb pretty quickly (just in the mid-zone) to make some useful floatation. By mid-zone, I mean the area deepest in the water while you are paddling. Thus the nose and tail rails would actually be fine, with not too much climb onto the deck.
We tested quite a few different volumes and rockers and found that the waterline while paddling will have a huge effect on the speed of the paddle. Very little volume can get through the surf quite well for what it is. Floaty boards glide insanely. In the midst of this range, certain boards paddle pretty poorly.
Lately, we’ve messed with the waterline a bit- making the rail volume subtley more as described above. This has been a concept used for decades but the location of the mid-zone/max rail volume had been around the chest. What we found is the zone seems to be around the navel or just below.
Can anyone please concur this, or refute this? This stuff is noticible by sensitive, or better surfers, but is hard to measure as a result. Separate testing would be beneficial.
Another thing we noticed is that there is ‘sprung’ and ‘unsprung’ weight with a surfer and board. In this scenario, the unsprung weight is most of the board, plus the surfers feet, some of his lower legs, and a bit of his upper legs. Unsprung weight is best minimized for small wave surfing. Aside from partial amputation, your best bet is to reduce the weight of the board (But this would be another thread) (sorry for crapping on…)