Danny and Ziva helped me patiently with their detailed answers to my emails in order to make the best choice for my setup. Thanks again to you both! After making the final order, I was kept well informed about the status of the shipping process. The full Music Commander set plus accessories arrived punctually and safely in a big, sturdy crate (which we kept to store our disassembled artificial Xmas tree in, haha!). With the video instruction and a little help from an extra pair of hands, building the set was quite easy. I made a small modification though: when weight is put on to the main desktop (e.g. when you lean on it), it tends to sink down from the dowels in the dividers supporting the upper shelf. To prevent this, I drove some screws up through the main desktop into the dividers (after pre-drilling a shaft). Why not make this a standard part of the design, just like you did between the stabiliser board and the cable management? Nevertheless, I am a very proud owner of a Studiodesk now, which helped me finally organise my home studio as smooth as I always imagined, contributing to an efficient workflow!
I wish I knew before ordering this keyboard tray that it won't work with a Music Commander that has a keyboard stand under it. The bracket that actually connects to the underside of the desk is so large it only leaves you an inch or so above the actual keyboard stand. So if you have a keyboard on it, it just won't fit.
Aside from that, it's also just a tiny bit wobbly. If all you are using this for is your mouse and keyboard with music production, it should be fine, but if you use that computer for anything else where having a solid keyboard/mouse matters, you likely will find this lacking.