I made a simple launch platform by welding together a couple scraps of steel tubing and a small shaft coupler with set screws, into which a 1/4″ steel rod can be held. Ideally I would also add a means to pivot the rod so that it can be aimed into the wind, as well as a plate so the rocket exhaust doesn’t burn the ground (and potentially set stuff on fire). For now I’ll leave it as is and use something else as the blast plate or more likely I’ll just make sure there is nothing flammable nearby. It’s going to be in a desert after all.