Yeah I know, it's completely different to modding a case.
Any way, I started building the frame for this build. These pieces will be backbone of the case, they make up the box on the right of the case, where all the hdds and cabling will go. I was trying to make the join as seamless as possible, so me and my dad came up with a pretty complex cut in order fit the pieces together. Once i use some filler and paint it, you shouldn't be able to see the join.