Thank you for making this mod.

The crafting multi-block does not form, reporting
3, 12, 4 - Block is not valid for use in the machine's interior

The core is a 2 x 2 x 2 cube, 5 crafting storage, 3 crafting CPU, completely surrounded buy Crafting Frame, to form a 4 x 4 x 4 cube. I have looked through other issues and made sure to not build it with anything touching it until it formed, and I have not only logged out and in (client) but am server operator so I was able to restart the world. Several of the similar closed issues for various versions mentioned that.

Not sure what other troubleshooting I can perform so I am asking for help.

MC 1.12.2
RebornStorage-1.12.2-3.3.4.1.jar

Rebuilt it, same cube design 4 x 4 x 4 with a 2 x 2 x 2 core. now it reports
frame is not valid for the sides of the block

not sure if a pic helps

needed heat conductors. dug for an old video.

this 64 blocks structure only holds 78 patterns and has 3 cpu. we can hold more patterns and craft faster with only 9 refined storage crafting blocks. much less space, faster crafting. this is not really worth the space or resources, but in 1.12.2 this mod is all we have for add-ons. In later versions we have single block upgraded crafters.