OK, I know i could get pretty fancy here and run my lighted buildings into an AUI and control them individually via the remote. that may happen some day, but not today 
What I thought about doing in the interim is running the transformer into variable input 1 or 2 (set to fixed) and out through the corresponding variable output to a terminal block. Is there any sense in doing this, or should I just hook it up to a separate transformer and be done with it, leaving the TIU out of the mix? Is there any benefit going through the TIU without the AUI?
