My first attempt at a kit card. I needed it in a hurry for a gift. I may tweak it again soon. If you have requests let me know!
The perimeter is 1mm, the pieces are ~0.946mm.
With my PLA print at 0.20mm and “Precise Z height” selected, this resulted in a very snug fit. I prefer that so my kit cards stay together. If you need or prefer a looser fit, I recommend scaling the Z height down slightly. And, use precise Z height to make sure the change makes a difference.
The author remixed this model.
Scaled the parts down to fit a kit card perimeter and added sprues.