Maestro usage with amp, auto-tuner(s) and downstream antenna switch

Coming back to the community after a long break, with a 6400 and a Maestro 'B' coming for my new bench - note the "bench" is not in the same room as the "shack".

What's the current thinking about controlling a 3rd-party amp, auto-tuner(s) and a remote antenna switch? Last time I looked, FRS was recommending setting up separate transmit profiles for "Amp On" and "Amp Off", which answered the amp question but sounded a bit clunky. Research turned up nothing on the possibility of controlling other gear... I have a PalStar HF-AUTO for 80-10M and a dedicated 160M remote differential-tee tuner. (at the base of the tower) A DIY 4-port vacuum relay antenna switch is mounted out by the tower to switch between HF antennas, then a single 1/2" hardline run comes back to the house.

This may sound a bit like a troll, but isn't... I don't HAVE to be able to switch antennas or put the amp in standby easily, and if I don't use the amp the ATU in the 6400 will flatten the feedline. I suppose what I'm looking for is whether there is any API or other opportunity to use the Maestro to control my other gear? There's no problem doing it with a Windows PC and software running in parallel with SmartSDR, but it would be peachy if I could hijack a little IO and use the Maestro from my new bench. (or the living room, etc)

Thanks!

Jim N7CXI