I wanted a low profile riser, that allows me to remove the glass when needed, but also was super sturdy and used minimal material. 
So i ended up with this design, perfectly accomodated the CFS and a single Space pi on 1 side, without protruding to the left or right of the printer. 
Parts needed: 
2 pcs 20x20 aluminium extrusions, 400mm length

6 M5x20mm screws
2 m5 threaded inserts. 

Optional: 11mm diameter rubber feet

Uses the original CFS transport screws. If you don't have them anymore, m5 screws can also be force-threaded in the transport holes. 
You will need to tap the ends of the alu extrusions to M5, theu come pre-drilled to the correct size. 

You will also need to drill the proper holes for mounting the CFS, although this is optional, it can very well just rest on these feet, but bolting the CFS to the riser will make it much more sturdy. 
Printing the spacer is also optional, but i find it makes everything more neat and tight.