I couldn't find an allen key holder I liked that fit the kit tools for the MK3S+ so I made this. Attaches using an M3 bolt (Tested with M3x12 for the Honeycomb M3 nut insert but M3x10 would be perfect). Key ports might come out a little snug but rotating each in its slot should give just the right action.
Slots from left to right hold the 2.5mm ball end, 3mm, 2.5mm regular, 2mm, and one of the 1.5mm keys. The Prusa kit came with a second 1.5mm key which I omitted from this model to place in a separate spare parts bin.
The author remixed this model.