Heatbed-Spring replacement for CR-10

My favorite upgrade of my Ender 3:

This is another Heatbed-Spring replacement. I created a negativ you can fill out with heat-resistant Silicon.
You need 4x M3x10 Screws for the Bottom and 2x M3x35 for the Walls.

I use this Silicon-Kautschuk:

https://trollfactory.de/produkte/silikon-kautschuk/haertegrad-shore/mittel-shore-a26-45/4956/tfc-troll-factory-silikon-kautschuk-typ-3-hb-zinnguss-hitzebestaendig-rtv-1zu1-1kg


Update 2019-06-24: I have added new parts with two top walls: put