YPC.... I never thoughtabout the self righting bouancy effect of a fat rail until I read whatyousaid many posts ago regardingall the variables to considerwhen thinkin ofweight needed to self right any board...

Just to keep your brain active here are some thoughts... (kyo/nqd versus boardshark)
I have a "boardshark" production board.I got it with a broken 'leaning' guy so i stripped it out electrically and added a leaky plastic 'Lisa' behind the guys feet... Initial tests showed me the board self righted very well even with LL (maybe due to the motor batt and driveline sunk much lower in the hull than kyo?)...... but did ride more flat, like not much leaning of the board in turns (maybe because of no cut-outs?....)

Anyway its a project for the future and the 'leaning' guy is in the cupboard atm I was just sharing some stuff foryou to sleep on...... Karl has always run the 'leaning' guy... reckon the maui crew know much about these boards....way ahead of the other two but i must say... The original Kyosho foam type hull is certainly a special board even if you have to build it like a custom.... and if anyone out there gets one i recommend4 things you should do.
No.1 you keep it in the box for nostalgia reasons.
No.2 copy it and make another with the current information available and make it work better.
No.3 know everything there is to know now and modify it as you build.
No.4 (my version) build it likethey say thencontinually modify the original mistakes/problemswhile enjoying the light weight foamy experience without worrying about how much you have changed its originality....

billybongo..... my last post regarding the batts was relating to a stock 30mm dia 1.4pich prop.... i tried a bigger dia prop good response slow speeds and was way fast but slow and gruntygetting there.... smaller dia gave better variablethrottle response and actually screamed at high speed but lost grunt in the slop..... temps were good in all situations 90amp seaking will be ample whatever way you go i am running same esc now..... actually that's a lie.... I amnow doing more waterproofing on it cause I hate it when they get wet and go zzzzzttt.... best bet calculate as much as you can then run everything at 70% of the stated max....

YPC if i ever work out how to upload my camera vision..... might be best i just show the relevent surfing/boating vision.. LOL