Lot's of cool things can be done with CAN integration.
The proceed unit simply sees a specific RPM and then sends a CAN signal to the cluster to turn on whatever light is desired. Very simple and basic.
I am working on retrofitting the DCT cluster to the 6MT M3's. I have a cluster sitting here for the last couple months, and have been meaning to spend some time retrofitting it to my M3.
I've taken both clusters apart and they are drastically different. More to come on this