Modular Dice Tray/Book

I made a dice book that can hold all my TTRPG needs. I call it the Rolling Tome. The magnets in the back cover securely attach several dice boxes, and a dice tower (dice ramp?).

There are two versions of this project. The Original version is the version in the pictures, and has space for a long skinny dice vault, a rectangular mini vault, and a small dice ramp. The spine and boxes were printed in PETG, and the covers were printed in wood PLA. I recommend using PETG for the hinges for the extra durability, although I also have a set printed in PLA and they're holding up pretty well. Thanks to hzzzln, the spine/hinges print in place and have worked great so far. The covers are big and flat so make sure you have your warping under control or it will create problems. I printed it on a Prusa i3 Mk3S+ if you're using something with a smaller print bed you may not have enough room.

I finished making the original version, and I didn't like that I was limited to only having three options for what I could fit inside. I decided to make a version that is more versatile. The Modular version has a standardized 8x8 grid of magnets 24mm apart. This allows it to fit everything the original had while being more easily customized to individual needs. I made a long skinny dice vault, a square mini vault, and a square(ish) dice ramp.

All the magnets used in this project were 8mm x 3mm. When I started this project I was using 8mm x 1mm magnets, and they were terrible, so I overcompensated by using a lot of them. When I upgraded to better magnets I left the holes in place in case anyone else got stuck with bad magnets. My boxes only need like 4-6 magnets a piece, so I recommend only putting magnets in as needed for the boxes/modules you have made. The covers are held to the spine with 12 M3*8mm countersunk screws and matching nuts. 

I printed this using a .6mm nozzle. I used a .30mm layer height for the spine, but it's pretty stiff so it may be worth going down to .20mm. The covers and boxes were printed with .35mm height. I printed everything with the largest flattest part facing down, and that worked out pretty well. I also did a color change when printing the designs on the boxes and it gave it a nice pop, you can probably do the same with the emblem on the front, and wording on the spine. The only piece I used supports on was the dice ramp. I printed that magnets down and had supports under the stepped overhand and behind the bow. There are probably better ways to do it. Printing the entire thing uses most of a roll of filament. I didn't track how much I used while I was prototyping, but I estimate a little less than 800g.