I'm in developement of one 4 U rack too ( secret of the features..) IF I send you the DXF front side under Coreldraw, are you able to design/editing over it the all new graphics? i'm interesting to see what for a graphics ideas you can have. Let me know if you like to make some.
Sure, I should be able to use the drawing to make a 3D model. Send it on over and I'll take a look.
You might be interested in seeing this actually even though it's not a 4U module. Just to give you an idea of how I can spice up an exsisting design. I 3D modelled the entire KORG M3-M and redesigned the colour scheme and materials used in it's manufacturing. .