Remix of the Ice Lock ++ by trapfox to include 1 or 2 additional tie-off holes on the base. The original by trapfox works great, I just wanted an extra tie-off point or two on the base. You’ll still need to download trapfox’s models to get the key that goes into these bases. It works perfect as it is!
EDIT: I've included models that have a built-in D-ring to make it easy to clip to the base using a snap hook or whatever. No need for supports, I've included a small support in the models. It should be easy to remove. Just tug on it with pliers and it'll come off easily.
2nd EDIT: I've included the STL to @trapfox's key for completeness. nIceLockKey.STL was borrowed from his Ice Lock ++ Thing (from which this is a remix).
3rd EDIT!! I was recently contacted by @trapfox and was given the go-ahead to include his original STL file for the body (nIceLockBody.STL). Take your pick on which ice lock you want to use! Enjoy!