15' of T-14 = 208 grains
10' of T-14 + 5' of floater = 209 grains
5' of T-14 + 10' of floater = 183 grains
Close enough that any adjustment shouldn't be necessary.
Eddie, as you can see by this, there isn't much difference between T-14 and the floater in a grains per foot comparison. And yes, these lines tend to be heavier than comparable spey lines as there's not much of a D-Loop.
Charlie, I ain't even finished med school yet! And I can't afford the malpractice insurance!