Has anyone else using UPB controls noticed that the UPB dimming switches used to control the primary side of the transformer tend to reduce transformer input voltage by several volts? Yesterday while finishing up an installation I noticed I had secondary output voltage at the taps of 12.2V when in the transformers control over-ride mode, and then when I switched this off and used the UPB Switch to control the transformer I only had 11.5V out. I checked the line voltage into the UPB Switch and had 122Volts, I checked the line voltage out of the UPB Switch and had 115Volts. Clearly the UPB switch was 'eating' or choking 5 Volts internally. Now that I know this I can work around it and compensate for it but yesterday it posed quite the issue. Anyone else found a similar situation? Regards.