Seedball launcher?
I'm looking to make a small, portable seedball launcher for geurilla gardening, I was thinking something potato cannon or airsoft style might be a way to do it. I want it to auto-reload as I will attach it to my bike! I was thinking I could use small CO2 cartridges to power it. Any tips or better ideas? I imagine I need to build up the pressure to a critical point to "spring" the ball away, are there plans I could adapt?