Couldn't help but notice a minimum set on the CRR SD40 is a 9 pound reduction (81PSI on the brake pipe). Im not aware of any automatic lapping system set up to reduce that much on a minimum set. Its always 4-6 PSI depending on how old it is and its accuracy. 9-10 pounds is a bit high and makes it difficult to set the air for a stretch
I don't own every DLC, but on the ones I do on the minimum reduction has always been to large, common DTG problem that I wish they would get right!