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Here's a shot of the one I am working on right now. And of course I have my drums.
Here is the link to my build, mine isn't any better then anyone elses, maybe a little different tho.
I say go with the pipe, I bet the old man would enjoy a flash back from the old days. Pipeliners are some of the best there is, I'm not sure how old either of ya are even, but if you can pick u a trick or two along the way, jump on it.
P.S. unless you want to hear him laugh, don't let him see my armature welds. I would feel bad if he pulled a muscle laughin at my stuff. LOL
If you have a 4.5" angle grinder, go to a welding supply or even tractor supply and get yourself a wire cup brush. They are used for cleaning rust. Just make sure to wear proper PPE (safety glasses, face shield and dust mask). Wires from those brushes hurt when they come off and go into you. if your oldman was a pipefitter, he should have no problem in helping make a smoker. Best of luck and hope to see some pictures.