This model is a remix of Andrew Miller's (@AndrewMiller_294406) D&D Dice Jail (https://www.printables.com/model/290446-dd-dice-jail/). This version addresses the design suggestions in the comments of the original model. 

Specifically, this model includes:

1) square pegs for the columns to connect to the top and bottom stone slabs, with 0.1 mm tolerance for a tight fit; the diamond shape in the peg slot in the columns does not require supports, 

2) slots in the top, bottom, and side columns for the bars to slide and lock into; the model now interlocks together fairly tightly,

3) only the bars that slide up are visible on the top slab, all other bars slot into the bottom of the top slab so that they are no longer visible,

4) the stone pattern on the top and bottom slabs is now continued on the columns,

5) the stone column pattern wraps around the side such that a long stone on one side continues as a short stone on the other side and vice-a-versa such that it looks like it was built out of layered stones, and

6) the model was redesigned in Fusion 360 so it is easier to make future modifications and adjust tolerances as necessary.

Dice Jail shown printed in Prusament Galaxy Silver PLA for the stone and Prusament Galaxy Purple PLA for the bars. Printed with a Prusa i3 MK3S+, 0.15 mm layer height, 15% infill.

Notes on the files:

Dice Jail v7… contains the final model as designed. The edges of the bars that slot into the columns are 4.00 mm wide and the slots are all 4.30 mm wide (0.15 mm tolerance).

When I printed the columns (0.15 mm layer height), the slot on the side ended up printing at ~4.10 mm and the slot on the top ended up printing at ~4.35 mm. This made the 4.10 mm slot way too tight. 

Dice Jail v9… contains a modification to one column that was copied 4 times to reprint the columns. This modification has one slot at 4.40 mm and one slot at 4.30 mm. The print files have the 4.40 mm slot on the side and the 4.30 mm slot on the top. The result is that the slots ended up printing at about the same size in the end.

Dice Jail v10… is similar to v9 except the 4.40/4.30 mm slots are switched.

If you look at the pictures, you will see that the stones on the side of the column look smoother than the stones printed on the print bed. In the picture with the black background and the 4 columns, the bottom two columns show the version you would get if you print the files …v9… (modification 1), whereas the top two columns show the version you would get if you print the files …v10… (modification 2). The key distinction is that in modification 1 (v9) the nicer looking side has mostly one stone at the top and bottom and one large one in the middle and in modification 2 (v10) the nicer looking side has one large stone on one side and three stones on the other. I personally prefer the columns as shown in modification 2 (v10). This matters because in final construction, I flipped two columns so that the nice smooth sides are shown on the front face and the back face, and the sides of the column that printed on the print sheet are shown on the sides. You will see both versions if you look closely at the pictures.

Print instructions:

Bar files: Nothing special needed.

Stone files: Add supports to the slot on the side of the column. No supports needed for the peg holes. If your printer can handle minor bridging, then that is all the support that is absolutely needed. This is what I did on my first printing and it printed fine with a few print issues in spots with large bridges if you looked closely. Instead, on my later prints and in these print files, I also added supports to the gaps between the stones on the print bed (4 columns and top slab).

Stone columns: If printing from a v9 or v10 file, make sure that the column is oriented on the print sheet such that the 4.40 mm slot is on the side and the 4.30 mm slot is on the top.