This is a Bank system that I created, which I will use on our Xbox Server group. It has a single code entry panel, Multiple chambers, and features the ability to change your code from within your Vault. The System is modular allowing you to add more vaults, more codes, more users, Etc. No knowledge of redstone is required to change your code, just push Reset code, then enter a new one. It memorizes your code even after you have left the Building! Very mud man friendly!