Seedling Grid and Pots

[original]: https://www.thingiverse.com/thing:820829 "kuiko's seedling grid and pots"
[kuiko]: https://www.thingiverse.com/kuiko/about "About kuiko"

This started as a remix of [Seedling grid and pots][original] by [kuiko][kuiko].

Initially, having printed a V2 pot and base, I discovered that the base needed a lot of gentle persuasion (read: 120 grit glass paper) to get anything like a reasonable fit in the pot, so my initial plan was to make a smaller "friction fit" base.

Then I thought about it a bit more and decided that an even smaller pot base supported by small tabs inside the pot would make it much easier to remove the germinated seedling by pushing the base up with the tamper (or a finger); plus the root system was less likely to get damaged when removing the baby plant.

Thinking about it still more, thew tamper, with a gentle taper on its top end, could also be used as a dibber, and some shorter pots would be nice, and being able to quickly create grids of sizes ot