Creality Digital Spool Rack Taring spool weights

English:

I have several Creality spool scales with the the issue, that they shut off automatically. Hence, when one wants to print again, one is unable to tare and determine how much filament is really left on the spool. To tare the weights of my spools from different manufacturers, I have developed this quick-change-unit. 
One can print different amounts and individually calibrate them in weight. In addition, I have designed them in a way, that you can attach them to eachother in order to hang them neatly or put them down. I have also made an extra construction for a 25-gram-weight, in order to achieve all useful weights.

To fix the countersunk screw I used a Ruthex M3 thread insert in the Rollweight_Universal.stl. 
When printing, I only added supports to the inlet for filling (with threaded insert holder).

When weighing, it is important to put the Roll Weight_Aufhaengung.stl, the Roll Weight_Deckel.stl and the screw as well as the filling Roll Weight Universal.stl, otherwi