I totaly 100% agree it needs spray rails.
Now most of the realy fast boat have a flat area at the back of the boat known as a riding pad too,
outboard and inboard /outdrive racing boats have these and they are only about 2 foot long by 1 foot wide.
There is a vid on the net called speed ronnie, it shows a guy with a 15 foot boat doing 100mph with only the
engine and the boats pad touching water. very scary
I would like to see a vid of ity running with spray rails, i think the spray rails (3 each side) would make it run real good,
and would definitely keep it a lot dryer for sure.
I would put straight rails rather than curves too, ( i have my own reason for this).
But overall i think its a decent build for a home build, but would benefit from a couple of tweaks.
I dont think many have or are building it as a dedicated race boat, its more of a nice big sports type boat.
a bigger superstructure would also be nice to make it into a big sports cruiser,similar to 80's/90's searay and campion type boats.
could even make it into a nice Lancer corniche express (very similar hull shape)
phill