I'm Simone, keeper of MB6IBO which is currently a DStar gateway with the NoV for DMR in the pipeline (any day now hopefully ).
I'm a member of the Cambridge Repeater Group (GB3PI) and have setup the gateway to learn about the Pi3/Arduino DUE/Zum setup for multiDV operations but with an emphasis on DMR. The CRG have tasked me with rolling out the same hardware system to one of our repeaters to bring multiDV mode online. Its an interesting project.
I'm here as this is yet another repository of useful information and others who have invented the wheel.
Vy 73 - Simone - M0BOX