A simple frame to mount your Mini-ITX motherboard onto - 5 variants.

The original (number 1) and a variant (#5) have each been checked with an actual motherboard twice now, and all versions share the same basic frame. I envision these as useful when mounting your motherboard in an unusual space or a custom case (I used an even thinner variant of number 1 with add-on standoffs when modding an Apple ][); all versions have M3- and M4-compatible screw holes.

You are free to remix these or incorporate them into your own design. I have tried both PLA and PETG and both seem equally sturdy.