The Microjig Matchfit system is endlessly useful for custom jigs, storage, organization, etc, but the bits and knobs are on the expensive side. I modeled and tested a number of variations to land on these, which are fully compatible with the Matchfit dovetail track cutting router bits.

Please note: I opted to use M5 bolts and threaded inserts here instead of the 10-32 thread size on the stock hardware; as a result, the the knobs and bits are not cross compatible.

I tested these with Bambu PLA-CF, so profile adjustment might be needed with other materials. I prefer the resolution when printed at .12 layer height, but they still work great at .2 standard.

The tolerance on the M5 Bolt part is intentionally tight to allow a friction hold with standard M5 hex bolts such as these; if you prefer a looser fit or your material is more prone to shrinking, just adjust the object-level X-Y hole compensation.

The rest of the parts have tolerances tailored to standard Ruthex-style M5 heat set inserts; the knobs are a bit more flexible in terms of insert length, but the bits are sized to accept M5x5.8mm inserts such as these.