Sorry to bother you about the prices. I really appreciate the list, though. Thanks!

How much would the parts on the list you provided cost?

I wasn't planning on buying it. I just need a simple plan and a shopping list and then I'll be ready to go.

The 90 degree elbow was what I had in mind. I've already seen the Thunderpipe and decided that it's a bit too expensive for my budget. Thanks!

I'm a filmmaker and one scene in an upcoming movie requires dirt explosions. I was thinking of building a simple, cheap pneumatic cannon, putting dirt at the mouth of the barrel, burying the main assembly and firing the dirt upwards. Is this a safe and effective method? Can any other methods be sugg...