Stream Deck Mk2 snaps in and does not wiggle (assuming you're using original faceplate - not tested with printed faceplates).
The author remixed this model.
Remixed to add snap-fit for Stream Deck Mk2, which has different bottom cutout and faceplate angles compared to Mk1.
Printed in PLA+ on Prusa MK4 with tree supports, Stream Deck snap-fits without additional processing.