The 1u->3u adapters are holding:
top row:
- https://www.modulargrid.net/e/divkid-rnd-step
- https://www.modulargrid.net/e/divkid-ochd
bottom row:
- https://www.modulargrid.net/e/expert-sleepers-fhx-8gt-gate-expander-for-fh-2
- https://www.modulargrid.net/e/expert-sleepers-fhx-8cv-expander-for-fh-2
- https://www.modulargrid.net/e/wmd-mscl-black-panel