EZ-Launch Bottle Rocket Launcher Without Pressure Gauge

I bought this to replace my old plastic (store bought) and PVC home made launchers for my science class. It worked great! Almost every brand of soda bottle fit on the launcher without any problems. I did have to sand down the inside of the neck on 2 bottles out of almost 100, so that’s not bad! This launcher is well made and after a week of launching nearly 100 rockets repeatedly it is still going strong. I’m going to by a second one for the next school year. The only negative with the launcher is staking it to the ground, it’s a pain to have to unstake it to put the bottle on and then restake it again (you definitely need to stake it down). I’m going to figure out a way to create a quick release for the launcher.