For those clubs who shoot targets other than SASS 16" square steel up close and dirty, here's a fun alternative .....
A couple of years back, I made a couple of 'bobbing' targets out of 2x4s that are still in service. They are operated by a falling plate, opening door, etc., pulling a support stake out from under the swinger. Holding the arm up with a popper resulted in a lot of lead spatter on the swinging arm, so don't do that any more.
Just recently, I made a turning target out of 2x4s and 1-1/2" white PVC. Found the downloadable plans on the net under 'dofmaster cheap turning target'. Check it out.
I powered mine with bungee cord, but I think I'll switch to surgical tubing. The bungee cord loses it's tension quicker.
Many years ago at an IPSC match, there was a moving target that propelled a target across a window opening. It was powered by surgical tubing and worked flawlessly the whole weekend.
On the other hand, our club had a reversible electric powered mover that was nothing but a PITA to operate and eventually fell into disuse.
Simple is good .....