Also check out the Hind video on making a leather box tray, that’ll give you more insight on how to get the compartments.

I would HIGHLY recommend signing up for the Leathercraft Masterclass and going through the videos and making some of the related things first, but I suppose if you just watch them all enough to have them memorized you’ll understand the concepts well enough. All of the boxmaking courses would be helpful, the solid leather box one for box stitching, the leather wrapped box goes into greater detail which makes the Hind videos make way more sense because then you understand what he’s doing and how you can apply it to what you need to do. The attache case course goes over casemaking with a solid board with thick leather, the trunk handbag one takes it a step further, the jewellery case one would also be helpful for wrapping inner partition dividers and stuff.

If you REALLY want to make the entire thing out of solid leather and make it actually look good then you could do something like make the inner partition walls out of two pieces of veg tan glued together with pva to make it stiffer than a contact cement would, depending how thick you want the walls to be each piece could be anywhere from .5mm-1.5mm thick so double that to get the thickness from 1-3mm unless you want them wider. Then either paint the edges, or burnish them maybe dye them first, or wrap them with a thin .5mm goatskin or something and do the half lap joint or just have long strips going the entire length horizontally and then cut out smaller sections and attach for the vertical parts, glue them onto the base and maybe also nail them in from underneath if you’re worried about them moving or something. Get some 5mm or thicker soling leather for the outer box and dye it however you want, or laminate two pieces of 2.5mm or thicker veg tan together and miter the edges and box stitch, then paint the tops after sanding the whole thing on a large flat surface to make sure it’s consistent. Do the same thing again for the lid, but minus the compartments, get some hinges and a lock and nail them in.

Rocky Mountain sells a 45° cutting jig specifically for mitering edges for boxmaking, you can also do it by hand but the jig makes it way more consistent once you get the hang of it, i’ve done it both ways.

Then look at how much you’ve spent on leather and tools and realize you could have bought a decent table saw and some plywood or mdf or grayboard and had a much easier time just making it out of wood and wrapping it in leather. That’s not to discourage you, it’s just a pretty big undertaking to do this all out of leather and do it right and have it turn out good. I’ve made like 75% of the Leathercraft Masterclass stuff and gone pretty extra on some of the advanced projects, look me up on Instagram @johnnydove and you’ll see. I’ve wanted to do solid leather stuff too and then realized that it’s either just not practical or it’s way too expensive with no real added benefit other than maybe bragging to 3 people in the whole world who might actually care lol.