Well, I wanted to do something more than stationary target shooting. Originally I tried to do a tram line moving target, but no joy.
However, after some thought I came up with these:
The base is pressure treated 2x4's. Initially I tried using screen door spring loaded hinges to get the targets to pop up, but they didn't have enuf horsepower. The answer was in the black "garden gate" spring (see picture) , which made it pop up nicely. (I'd recommend simple hinges - no springs- with the garden gate black spring.)
The target is stapled to 5/16 plywood upright. We cut the center out to lighten it. A string is attached to the upright from the base so the thing doesn't tear itself apart (the IDPA target also catches a fair amount of air, slightly slowing the action, but the black pring does a good job of getting it to pop up quickly.
A simple gate latch with a long cable actuator sets off the target.
I ended up with four pop ups total.
I also made some "swing down" targets. Nailed a 2x4 across 2 trees, made some target frames that I attached to the 2x4 with some eye hooks, and used a prop stick to hold the targets in the raised position.
Using the same type of cable actuator, the two targets "swing down" One is marked as a "no shoot" requiring some quick decisioning.
Cost for everything? About $100.