we have had a couple of failures in the main unit's, seems they won't let us program one channel ..... and it's always the same channel. and can be frustrating to code several switches to one channel
I've been toying with the idea of using the faulty units for my shed lights, which will all be 12v when it's finished (groan!) that way i can turn the lights on/off from the house without running switch wires.
but you could also use one to switch a relay of higher amps(like they do in the jayco's), or even a 12vdc/240vac relay to turn on 240vac stuff.
a retro fit would be pretty easy for new stuff........ just mount it down near the setek, run your new wires into this and away you go .... then just plonk the switches wherever you want
now all we need are wireless ummm wires