A PCB/panel set for a MIDI-THRU/multi module for your Eurorack system.
This is a 100% through-hole kit with a relatively low component count and no wilfully weird components, unless you count a 6N138 opto-isolator but they're pretty easy to find. Consists of a single, opto-isolated MIDI in port and a set of three buffered MIDI out ports. Note that the ins/outs use the old-skool DIN-5 sockets - I'm gauging demand for a TRS version but don't hold your breath.
The PCB/panel set comes with an appropriately cut and engraved panel fabricated from 3mm perspex, plus you get the appropriate bracketry to mount the board to the panel - unlike most of my modules, the board for this module mounts perpendicular, rather than parallel, to the front panel - as a result it's quite a bit deeper than most (~50mm with power cable attached). If you order the PCB on its own then you'll have to roll your own solution.
You can get the BOM and schematic right here: https://bitbucket.org/yorkmodular/midi-thru/src/master/