Here's where we stand: the Legacy base has been disconnected and TMCC has been restored. The electrical bridge has been removed. All power supplies are plugged back in, and all engines wake up at rest. I was just under one section of the layout, and can see potential trouble spots in the ground bus. Those will have to be modified.
Dale, I think I might have an old AM radio around here, just gotta find it. HAHAHA. I thought I saw the instructions on your website, correct? There may be a lot of issues discovered as the room is laced with earth ground sources, and many locations have insulated track ground wires passing in close proximity to them.
GRJohn, I totally agree with your plan to proceed. When I have dealt with as many of the wiring issues as possible, we can reevaluate the TMCC signal. That's when it might be time to go for the signal amplifier. In the meantime, I have a lot of work to do.