Design ATX PC Case

I need a new custom PC case for my ATX motherboard. The project needed to be done in freecad, you must work with spreadsheets for easily fixing dimensions. Features needed: the MB ist mounted on a metal plate, this plate should be drawable to the front side (like a drawer) Case need to be compact The case can stand or layed down one side needed to be made out of glas or any other transperant material to have a direct look at the motherboard to get it much compacter a TFX PSU will be used, which will be placed above RAMs -> Case will be much more compact (pic1 fingerposition) like on pic1 the motherboard is orientiert to top of case, when standing (USB, HDMI outs) I also need to have a slot for my external drives (like on pic2) there is no need for space for harddrives, there will be only m.2-SSDs You dont need to model Motherboards, CPU-Ventilator or RAMs in detail. They should be only in the file to get correct dimensions. There are many parts for free to download. max CPU-Ventilator height: 15cm max. Graphiccard Length: 20cm PSU Dimension: 175 x 85 x 65 cm