I’ve designed a set of 3D printed M2 nutstrip for the Bristol Uni antweight comp. Its primarily aimed at new builders who have easy access to 3D printers but little or no CAD experience, but I’m sure you ingenious lot can find a way to make use of it.
They haven’t had any combat testing yet, so they might turn out to be completely useless, but I’m optimistic.
The holes are 8mm apart, with the vertical holes offset by 4mm from the horizontal ones.
It might take a bit of tinkering with the print settings (particularly the horizontal expansion) before an M2 bolt will self tap nicely.
A couple of examples from the (rather bodged) bot I built to test them out:
Connecting panels together
A rather dodgy hinge
Hopefully you find them useful! 
