-
Seedling Starter Pot Bottoms
One of Mary’s gardening compadres teaches a kid’s class which involves starting seedlings in “pots” made from the cardboard tubes found in paper towels and toilet paper. Cutting four slits in the bottom of the tube and folding the flaps inward puts a bottom on the pot, but what’s the fun in that?
Draw a 42 mm circle, set the layer to cut corrugated cardboard, turn the circle into suitable arrays, flatten some boxes from the heap, and Fire the Laser:

Seedling starter pot bottoms Collect the fallen disks from the chip tray and jam one in place as a serving suggestion, where it fits like it was custom-made:

TP roll seedling starter pot bottom You’d still want to fold some flaps over the disk to keep it in place, but now your pot has a real bottom.
I have no idea if 42 mm is a Galactic Constant, but it worked for the pile of tubes we had on hand.
That was easy …