And the stuff I noticed- I use tiles from the local Habitat for Humanity Restore (a dime a piece) for small bats; for big bats I bought bigger tiles there, and cut the corners with a $10 tile saw, also bought there. I usually don't use calipers; instead I made gauges for inside and outside measurements out of cheap linoleum tiles. I cut the 12"x12" lino tiles into four pieces to use as bats for my faceted mugs, and even use the whole tile, with holes drilled in the right places, to throw bigger bigger pots (I layer two on top of each other so I don't hit the bat pins when throwing). And yes, the pot distorts when I lift it off, but comes back into shape when placed on a flat board.
Of course, part of the incentive to make do with stuff like that is due to geography- When I need something quickly, most of the time I can't just go and buy it- that's the price I pay for living on Maui.
|Large lino bat|
|Throwing gauges for lids|