We made a new design for the Velleman K8200 / 3Drag 3D printer. We used 2 TR8 spindel motors (can be found here: http://www.charlies3dt.com/en/product/nema17-stepper-motor-lead-screw) as new Z-axis. This is more sturdy than the original design! Pictures of prints following soon.
We also changed the bed with a MK2 heatbed and we will add a new extruder and some electronics.
For questions let me know here or send me a mail firstname.lastname@example.org
Use 3 solid layers no support needed. You need to clean the holes after the prints.