2 TMCC units on one layout

NO!  One command base to a layout.  You'll create pandemonium with multiple command bases!

If you actually end up with signal issues that aren't solved by using the normal TMCC signal improvement techniques, the DM TMCC Buffer is probably the way to address them.

While I'm conventional at heart, and only recently even considered a system, I must admit I really wrinkled my nose at the suggestion of using 2 TMCC units.  But what the heck do I know?

Just glancing though the posts on the "booster", is this ready for sale and if so, what's the cost?

Thanks again!

Troy

I still have a handful of parts kits.  I can also build one, just takes some time, I build them to order.

Send me an email to my profile address if you're interested in one.

I have used two hand heads on the same TMCC layout with only one base. It works well similar to running multiple Lion Chief locomotives at the same time. You just need two Cab 1 remotes.

Now you know - 1 base only - center it to the layout

Also, consider the room wiring to help - base and track power circuit separate from any other circuit - also, modern code - a good earth ground is essential

No fluorescent lighting

Never, never connect more than one TMCC or Legacy base to the layout ground rails.  It may work but strange things happen.  Your 30x60 should be fine with a single base.  The RF signal from the base is broadcast in two paths: through the track ground rails, and through house wiring and copper pipes (The ground plane).   Review Dale Manquen's TMCC Signal Basics article as a reference.

Loss of signal will probably be the result of poor ground plane and there are many threads in this forum on resolving ground plane issues.  Some things I have learned helping to resolve TMCC signal issues on multi-level layouts:

1.  Make sure the TMCC output is connected to each loop's ground rails.
2.  Isolate all metal bridges and accessories from the ground rails.
3.  Run a ground plane on the underside of all upper levels that overlay lower level tracks.  Aluminum and copper tape are your friends here.  Metal bridges (isolated from rails) are connected to the ground plane.
4.  Frequently test the isolation of track rails from the ground plane.  A single track screw or accessory connection can destroy the isolation.

Solve ground plane issues before adding a signal booster.

Just a couple...

Instead of “ground plane” you might use “ground wire antenna” to refer to the antenna with the airborne signal. It’s the ground wire in your house wiring. It’s not a ground plane. Dale M tried to crusade against the use of the words “ground plane”, but it was too catchy a phrase and it’s persisted. I mention this in his memory 🤓.

And, you only need a thin wire over where the engine runs, not foil, etc. When it’s added to the layout because a track above is shielding the engine below from the airborne signal,  it’s best to have it as far from  track running above as possible.

Tracker John is correct, the buffer is the last step when all else fails.