I've bought a professional knife set at the last Black Friday onto Amazon store:
the knive set comes without block so I created one.
I inspired from this awesome idea: https://www.instructables.com/id/Knife-Block/ and I remixed the project for FDM printers.
I wolud speak about safety because this thing will be at home and the knives may be dangerous, then I hope you follow three important steps below:
1) Use magnets as described on the project, you can find here:
2) Use rubber pads, print them with TPU95 or other rubber filament
3) Create the ballast, create it with milling machine, the one in my project have a weight of 2.3Kg
You need these hardware:
Phillips flat head self tapping screw 4.8mm x 22mm: 2pcs
Phillips flat head self tapping screw 5.5mm x 25mm: 2pcs
Neodymium magnets 8mm x 3mm: 4 pcs
Check everything else on the PDF and pics.
UPDATE 1 MAY 2018:
Added base without support for those who are lucky to have a bigger print volume ;)
UPDATE 3 FEBUARY 2019:
Added shield in editable STEP file
For the beginners: Follow the pics for printing position.
Use cyanoacrylic glue for assembling feet, body, head together and all plugs with magnets in the holes as well.
Remove additional support on the base.