My digital indicator: https://a.co/d/2FFRM4I
My spring: https://a.co/d/c3aXYTS
My springs for new version: https://a.co/d/e7rfH6a

Each digital indicator is differently sized a bit so yours may or may not fit unless you have the same one I do above.

Should print without the need for supports. I used a tall layer height of 0.28mm and it was fine. The bottom piece for the new version needs only very simple supports. The new version uses strong enough springs to open the lock when the correct combination has been entered so it may be too hard for most people to push while manipulating. Getting other springs with the same outer diameter and length but with a thinner wire might be best.