I today installed the Bondtech DDG Feeder in my Ultimaker 2+, installed the firmware provided on their webseite and did a factory reset afterwards. If I load a filament through Ultimaker's menu, it gets fast forwarded in the bowden tube but it ends before entering the print head. From there on the filaments proceeds in the bowden tube with the print speed until it finally reaches the nozzle and gets extracted. Unloading the filament causes the filament not to fully unload! With the origina