Take some metal, draw some lines, drill holes, some rolling, weldding

throw in some 50cal shells and this is what you get

pretty cool dave. Gotta a pic of ya forming the air cleaner, mounting the cartridges, etc.?

I used a Harbor Freight 30" break with a sheer and roller, I have. end caps are just 22ga metal cut round welded to a rolled strap. The barrel is 1" EMT. The shells are screwed in to pipe hanging strap (which didn't last, vibration!) I'm going to replace the hanging strap with leather and wrap the end caps with leather and tie them with tassels. I also have a foam filter cut to fit inside

Well done! Get it? Weld'un... nevermind
That's a cool idea, leather will prob hold better too.
let us know how it comes out.
Edge

cool!