What rear wheel IMLP

Folks,
I had to send my Renn disc back last week due to a Delam issue. The owner says he will get it back before I leave for the race. Leaves me no time to ride it. I have a set of HED 3s that I have been training on. I was planning to ride the front HED 3 and the rear disc, but not crazy about running a new wheel for the first time at Lake Placid. Thoughts?
Kevin