jjmmagoo,
I fully understand your frustration with all the switch wiring via your AIU, for this exact reason I went into the FasTrack Command Control Switches, they eliminated 99% of all my AIU switch wiring. Of course I had a fair sized FT layout that transitioned in & out of 072 Lionel conventional tubular switches already. If you are using FT, I suggest you take a good look at the CC switches, and eliminate the massive wiring mess.
PCRR/Dave