Have a PU board that i need to retire ... ordering a new board to replace it ... can only get a epoxy blank. Been awhile since i've ridden /ordered an epoxy board. The existing PU board is 6'8" x 21 1/8 x 2 3/4. To get close to the same floatation - feel with an epoxy - should i go thinner - say 2 5/8 or is it not enough of a difference to worry about and leave it at 2 3/4?