Ice 9 longboard question

I am planning on using the Ice-9 10-3 blank for my next project and am curious as to which density to go for. I am looking to make a 10-0 3 3/8" thick flat rockered log and I would like it to weigh in around the mid-to-upper 20’s in weight. I used to use Clark classic weight and Walker Old Man foam, and then lay-up 3X6 deck and 2X6 bottom with epoxy resin to get a bombproof log that would dent rocks. My understanding is that this stuff is super stong, so I am looking to save a few bucks on resin and cloth and just do 2X6 top and single six bottom. Question is, would the tow-in board density get me in the 25-30lb ballpark, or should I go with the next one down, which is the welter weight, with this glass schedule. Thanks in advance.

-Brian