I'm attempting to use a supah/piston style valve for a tennis ball cannon we are making as a part of our senior design project but my team, and my teacher, doesn't want us to actually make the mechanism so I'm looking to purchase one. The only site I've found so far was SGTC.com but their phone is o...

Hey, I can't download the pdf. Anywhere else I can download it? Or can you email it to me?