Barry,If we didn't create any TIU tracks then why does it work in the one power district "as advertised"? I am at home now using my personal controller to create TIU tracks to see the screen prompts.. At the club we attempted to create TIU tracks using the System Menu. After that when we select "TR" the handheld screen will show "TIU1 VAR1 , TIU1 VAR2, and the TIU tracks we created "AA" and "BB". We then selected "ALL". At home after I select "ALL" I arrive at a screen showing "ALL TIU TRACKS" , a voltage value (from the Transformer?) and softkeys "TSV". "TZV" and "MSV". I can then set the MSV value to 10 volts which is what we did at the club. At the club when we place a voltmeter measuring AC on the track it shows the same MSV value in both power districts as set on the handheld. Anyway, I will return to the club tomorrow and work on the problem with my fellow members. Our next step will be to bring another TIU to see if that changes anything, then repeat the process. Thanks for your help.