This model is inspired by https://www.thingiverse.com/thing:3026674 by TruncusEnc. The original model has some alignment issues on micro:bit v2, revealing the adjacent traces. I recreated this from scratch with better alignment, removed the edge support so the alligator clip can bite into the PCB edge notch that was added in microbit v2, and also made it less tight so it's easier to put on/off.

Print with no support.