I was lazy the last days, but could finally finish my upgrade project.    Thanks again to @ultiarjan for his great idea and for his mount. I modified the holder and cut off the parts that are not needed for the UM2GO and it works great. I can access the feeder easily and could load and change material without any problems.     Additionally, I want to have to spool holder also on the side, because of the better handling and the "natural" way the filament is bent. An