Is there a reason I can't open this in any blueprint designer in game?

This is an easy 5 star for the concept and the versatility alone. The fix is easy to do on our own and teaches us some stuff along the way.

Crunchy is right, one MK1 belt and one MK1 Elevator must be upgraded to MK2 and it is the output for the 2 constructors above (Screws, 2x80, ). The 2 things are accessible from the ground level, right side of the module when you create it. 5 stars. Note: I think tstern27 below commented on another blueprint, "MK1 Starter Module 2 MK1 Starter Module 2")

The only modification I had to do was the Mk1-Mk2 belt on the top floor feeding the screws into the assembler for the reinforced plates. Everything else worked great. Thank you!

I had to fix the screw output. it´s 80/min and is delivered with mk.1 . You need to change both mk.1 Elevators and the output mk.1 belt into mk2. After this smal change, everything worked perfectly. Maybe the creator changes this in his blueprint.

Amazing design for any starter base!

Loving this setup! This helped with my redesign. Thanks so much.