Great work! I found that if the seedlings are stretching too much and fall to a side.. it means the light is too far away.

Some cannabis stretching tips:

https://www.royalqueenseeds.com/blog-how-to-control-stretching-reigning-in-cannabis-growth-spurts-n487

Those 3D printed mico-pots.. could you make it so there are two pieces and when you are ready to transplant you can push a piece up from the bottom and it slides the plant out? If that makes sense?