Polecat Thumper (or super Thumper, or whatever the 10" version was) looked pretty close...
Then they did a 16" or 20" version... (heheheheheh)
Interesting project. What happened to the minimum diameter idea?
There was some guy years ago. RocDoc or something like that? He was building a pretty BIG BIG DADDY! It was like 30" diameter or something crazy like that?
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