I have to agree with bfisher that I find it impossible to have this problem with the nitrous system, so I started to check martin website for more info.
According to your post, the cams have the markings a-e and the only cams from 2004 that have that is the Tru-Arc system. In my earlier reply I said that the catalogue had the max DL listed as 31" but when I looked at the spec-charts for Tru-Arc and the M-79 RazorX its listed as 32" (31½" should be at the D setting). Listed string and cable lenghts are:
If there are someone more familiar to this system I hope they can help you further.