Dave, Your math is different from Orphans math by 15#s.

"You need 32.5lbs I think. 285 +25=310 +15 to get to 325 but you only need 1/2 of the 15lbs which is 7.5 so you need to add 25+7.5=32.5."

Btw, I spoke with three Nacra dealers yesterday; all three came to the same conclusion of 32.5#s. I have written to the class and am awaiting their interpretation in writing.

Thanks to all for the input and ideas,