Secure Redstone Door

My latest project I've been working on for a few hours. I tried to make the redstone as inaccessible as possible to any who may try to break into the circuit rooms to bypass the lock or mess things up so it's encased in bedrock and obsidian. I will be adding a hidden entrance to access the redstone rooms later on.

It's a 8 lever combo lock that opens a piston door on the far end of the room. The entrance to this building is a 6 piston door that you may open from inside or outside with the flip of a lever. I may be adding a few more secrets to this build before I finish it, or I may add them to a later project.