Just to add to confusion there was an owner who said he used the CG Precision controller for the M3 to control the valves. It makes sense that it would work since the actuators are the same as stock M3/M4. What I don't know is whether this setup supported the DME control.
For now I decided to live with the flimsy BT remote. When I'm really bored I will reverse engineer the valve control box and come up with a reliable wired solution.
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