@ComedianTF2 Yes thats was actually my first choice.
I wanted the 120Z version, but it only comes as a kit and its company policy to only buy full service machines and i wasnt trusted with building the thing myself.
also if you add the comfort features it ends up more on the 6000 side 
but good thinking.
@dc42 yes already printing parts
RIP delta but now i cant wait to saw it in half^^
never thought about cat cables, but that makes total sense.
i found this which looks pretty convenient.
https://www.ebay.de/itm/1x-RJ45-Buchse-auf-Schraubklemme-8Pin-Anschlusse-Ethernet-Kabel-Extender-Adapter/184033033699?hash=item2ad9393de3:g:Rg8AAOSwwmldd1YD
thanks
Just to finish this adventure off.
It works now, because i managed to use my original modem in bridgemode with a new router. The printer works now with the new router as before.
@ComedianTF2 yes i suspected that much, but its good to hear this from someone else. ill dropped the temp by 10C and added a z-hop and optimized the travelpaths. lets see how that turns out.