ACA Howler Growl Test (Drill Wind Up)

This is my recently acquired 1987 ACA Howler. It is a 9/12 port dual tone siren, and is basically a rotational version of the dual tone ACA Screamer. I understand it to be a pretty rare model, having been produced in very limited numbers. This particular unit once saw service in Minnesota. This is the 3-phase version, so I can't do powered tests without a phase converter.
Anyway I was messing around with my trusty old 18V DeWalt drill and a socket bit and found that I could get a decent growl out of the siren with it.
Eventually, a friend and I plan to use a phase converter and do a powered test of the siren.