Mario Brick Shelf for Stackable Question Blocks

I saw the original model from @TommyGunOG (NO AMS Stackable Super Mario ? Block Storage Box by Tommy Gun MakerWorld: Download Free 3D Models) and decided it needed a shelf to match. I found a basic 1x1 brick design on Thingverse (thanks to MADEin83 for sharing the original design, https://www.thingiverse.com/thing:4704927), then used MatterControl to remix the longer model and incorporated Tommy Gun's lid to the top of the brick so the question boxes would fit accordingly. Also created some keyholes for the backside so it can be mounted. I have been dabbling for a while, but this is my first submission of any kind, so I hope someone out there can make use of it! I used the P1S with AMS and whatever PLA I had laying around (in this case, it was Elegoo PLA Pro; after some fine tuning in the print profile, it actually worked out very well). I'm sure it will print fine in whatever material you choose. Also, I chose for the 0.12 layer height because I prefer quality over speed, but