Bio Engineer Archive

What is the smallest size crate that I can put on the trader and have Tailors happy? Are there increments that apply just some times? If they have singles from the same lot, can they stack?

This is a buggy still. Identical tissues should stack. DOes the schematic look like our DNA schematic, where you can lay them out or is it like the Pet Vit B where the 2 have to be identical? Or is it bugged and have to be a crate?