Magnetic wrench rack
This is a wrench rack that can be laid flat or attached to a vertical surface with some double sided tape. works best with stubby wrenches but does work for longer wrenches as well. The only part that needs support is the "magnetic wrench rack" I printed mine with my "support overhang angle" at 60 degrees, so that it only uses supports on the sections parallel to the bed.
I used these magnets slid into the pieces and then put some hot glue in the open end of the hole to hold the magnets
https://www.amazon.com/dp/B0CPJ9LWFN?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_3
A dab of glue on the last spacer will hold the whole thing together or you can experiment making the spacer slightly smaller for a tighter fit