When adding a heated bed to a Velleman Vertex K8400, an extra power supply and a heated bed expansion module are needed. I wanted to be sure that I got the holes in the right place when drilling, so I designed these template guides to match the screw holes on the PSU and expansion modules accordingly.
The PSU drilling guide matches a JCPower JC-240-24 Chassis Mount power supply (24V, 10A)
The Heated Bed Expansion Module drilling guide is for the Board210A-style MOSFET RAMPS upgrade.
I made a video about adding the heated bed to my vertex, so you if you're thikning about using these drilling guides, you might like to take a look at how I modded my printer.