So I like to share with you my 3D model of this printer.
It is the original like I have build, without any self designed stuff. Detailed to every washer…yes it was a lot of work!
Please make in mind that I measured everything by hand, and did not measured it all perfect.
But still it is great for reference.
Model is in Solidworks 2016, step and x_t. If you need any other file formats please ask.
I also think I am a bit late to the party since I see there are a lot of cheaper printers out there already… But this one is more fun in my opinion. 
Download:
https://grabcad.com/library/k8200-velleman-or-3drag-1