Minecraft Combo Lock (2nd attempt)

This is my second attempt at a combo lock, meant for an adventure map i am working on. ten buttons plus a reset, only five need to be pressed to open the piston door. top image is the button interface, middle image is the redstone wiring directly behind the buttons, and the bottom image is the entire system. i plan to make it more compact when i implement it on the map, although at the moment it is as simple as i could get it.

Texture pack is predominantly Last Days, personally kept up to date with the current minecraft releases and modified to be employed in my small adventure map im working on little by little.