Hi, everyone.  I have a seven-port, five-zone Wundafloor UFH system, with a Heatmiser wiring centre. I've been trying to get my new Salus actuators to calibrate properly. But I'm having an total nightmare with them. The main problem is that on three of the seven loops, the actuators do not shut off the flow when powered off. The actuator pins simply do not understand how far to move. This does not happen on the other four ports. Wundafloor has kindly sent me replacements, but they have made