That's really cool, thanks!

Tangential question out of curiosity: I see several designs mention cost, eg. a "$3 box" and I assume this is just counting the cost of materials? How much does the "manufacturing" cost factor in, eg. amortizing the saws and equipment over all the stuff that you might make out of them?

Ever since I learned the math on swimming pools (which comes out at something like $400 per swim you'll have in them IIRC) I've been curious as to how wild the numbers come out to be on most of our personal projects and how economics can't be the measure for them. I'm curious if you have some thoughts on that.