Graham's Brig 28mm

I'm trying to build a drop ship for Rogue Traders to travel between their void ship and to the ground. I drew it up for fun, but I'd like to use it in Kill Team or Warhammer 40k. This model was meant to be able to be taken apart so you can put 28mm figures inside. It is very much still a work in progress. I haven't added tolerance zones yet, so I'm not sure how well things would slide together. There are no guides to attach the parts together yet either, and the wall thickness is a massive 4mm.