YES! Another person who wants an ACTUAL CUBE, not just a cuboid shape... like most cases are when you search for 'cube' (grrr). The wood is going to look fantastic!
My cube (
imgur link) is 200mm to the outside edge (8L) with 185mm inside usable (~6.3L). The walls are 5mm acrylic mounted into 10mm aluminum extrusion (microrax), which adds to the overall size. I put an 80mm fan on the top, and 140mm inlet on the bottom of the case. Turns out I could have fit a 92mm fan on top, and I will update once I get a R9 Nano to replace the R9 270x and have to also redo the side panel to relocate the fan spot.
I decided against the ODD, and only have provisions for 1 SSD at the moment. There is plenty of room in the cube for more, but I would have had to have them mounted to the side panels, and that would have... detracted from the aesthetic. It's bad enough that I have a hole in one side for the GPU to breathe.
Anyway, I'm excited to see how yours turns out!