Spring Delta/kossel bed support for 2020 bar

Spring support that fits on a 2020 bar with a aluminum heatbed + glass plate (total height 6mm **).
Printed with PETG or ABS for having no problem with the heatbed temperature.
I use 3 of these on a Delta/Kossel plus from Anycubic with a 240 mm heatbed + 240 mm glass plate(it can be used also with a different model/size printer).

**the updated version can be used also with a 3mm tall bed (only glass or only heatbed).

You need these material :
-1 M3 screw and 1 M3 nut for fixing the plate;
-1 M4 20mm / 25mm screw and 1 M4 nut to fix to the 2020 bar;
-1 spring (max 8mm diameter), the length depends on the length of the M4 screw and the force of the spring.

EDIT 04/09/17 :
Uploaded the base_2020_v2 , it's more stable and grants the screw to stay vertically fixed.
The base now requires 3 M4 screws :
-2 are used with 2 square nuts o t nuts to fix the base to the 2020 bar (i use 8mm lenght screws)
-1 is used to support the bed(25mm / 30mm lenght), this screw is fixed to th