This seems like a good one, the sizes are listed, and it seems pretty cheep. Anything any of you would change about the design? Or advice?

I meant more detailed, on like the installation, pipe sizes, etc.

Okay, this weekend me and a friend have decided we want to build a spudgun. We're aiming for a budget of 30$ or less, seeing as I doubt it should cost more. We don't want anything that's gonna require a crane to move, something sensible. I'm gonna be doing this without consent of my parents, but wil...