Nice article! This is very similar to how I myself keep chicks. I swap in a heat plate for the heat lamp, because it uses less power and of course, lower risk of fire.
Just a note on your heat lamp setup, it is indeed possible for it to fall even when set up like that. I've had it happen - the handle isn't really attached to that lamp, it's just clamped around it, so if the the wingnut loosens, which can happen over time, the clamp will let go, and the heat lamp will fall.
Instead, I set up heat lamps in such a way that if they do fall, they either will unplug themselves on the way down, or if they don't, they're caught and hanging by the cord.