If you are going to the effort to build a pair, for the price of a couple sheets of no rez, I'd personally just do it.
I don't see the point of "penny pinching" at this level
I know these aren't the same as the H-frames with the 12" drives, but the principal is. I believe it was Tyson who started off sans no rez with his Super 7's and said he was shocked at the difference it made after adding it.
jay