EDIT: I have made a replacement that does a much better job of hanging on to the PVC mount. Now that we have faster print times you can crank this out in a couple of hours:
This is a simple bracket for making a field expedient 2M ground plane antenna using a SO-239 connector and 5 pieces of flexible rod or wire.
Instructable in progress, but the photo should make it pretty clear how to use this. Tension from the cable running down the PVC tube (or other mount) helps keep the ground plane wires at a roughly 45 degree angle.
After you've picked your center frequency, cut the wires down to 1-2 CM above your desired length, then slowly trim them while checking your SWM. I got mine down to 1:1.1 in under a couple of minutes.
I used 1/16 stainless welding rod -- it's just strong enough to keep a bend and stay straight while not being too thick/heavy to manipulate with a pair of pliers.