Right now, I still just use the key switch that I mounted about 20 feet away. The AR timer is still on my want list, but I might wind up making a reproduction one. I could make it "look real," and I could go to the local electronics junk store and buy some sort of clock motor and mount microswitches, and rig it up to do an on-x seconds+off-x seconds as long as I hold the button.
I would also be interested in setting it up with phone control, or even internet control. That way, I could drive to other locations and see if/how loudly I can hear it
TOO many projects, and not enough time!
Charles