3D Printer themed Business Card holder

Its a small Business card holder i created for the Contest. I used the filament spool model https://www.printables.com/de/model/161350-filament-spool-mini by Glacial and the nozzle https://www.printables.com/de/model/207248-nozzle by 3D PC. You can get their STL files via the links or by downloading it directly from the folders i created. The filament piece can be a bit tricky to print, so maybe i will make a simpler model. I would love some surgestions or some feedback!

Im not very good in 3d modelling, expecially with this filament piece I created, so i would love if someone could explain me how I could have done it better.