Road sign geocache

You have probably seen this cache model somewhere before. I have too, but I have seen a cache damaged many times. This happens when someone uses a lot of force to pull off the threaded holder. That is why I created a model that includes four supports that will prevent the holder from being pulled off. The support is marked with a red arrow in the picture. The holder has a classic thread for a PET tube, which is used to store the logbook.