I think, from this moment on, this project is okay to reproduce. I did not post details with video, here are some:

• Assembled the new iteration of boards, new buck converter works.
• Built-in milliohm-meter works.
  • After checking the results, I decided to use 2R heaters instead of 10R. Also ordered more MCH units to recheck.
• Updated 3D-prints are ok

Pending:

• Changed hotplade oxidation type (matte instead of glossy).
• Adjusted button hole configuration to exclude manual cleanup.
• Still waiting for new thermal paste.
• Still waiting for the new video lights and supports.

In short, all critical things are verified. But there are "temporary logistic issues" in Israel due to "known reasons", and I'm waiting for my orders to verify a batch of small details. Can take up to 1 month, IMHO.