is anyone interested

I have a potato cannon unlike anything I have seen on the internet. it is built for non combustion and is made of copper. It utilites four electric solenoid valves and I use Nitrogen for propulsion I can deliver 300psi to the barrel I have no idea what the range is because I don't have anyway of tracking the projectile and I don't have an area open enough to try . I live on a lake and the projectiles clear the trees on the farthest end . if anyone is interested in seeing it or purchasing it leave a reply on here thanks