Wavelord looks rad! I get the hesitation though. I’ve got a skoolie in the drawer too, but I keep skipping over it for simpler stuff.
The washers are slightly custom. They start out with a much smaller inner diameter. I stack 5 or 6 at a time in the chuck of a metal lathe and bore the ID to .470”
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As to where they come from, I picked them all up on the ground outside a burned out factory down the street from my house. There’s an open area behind it where some friends and I used to ride skateboards. They added some fencing and I can’t get back there anymore, but my buddy made me this drawing of the spot. Not sure what I’ll do when I run out of them, but I’ve got quite a few left still.
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