Noob wants to build a USB Traktor DJ-controller

[MissingNo]

Hey guys,

since my crappy DJ-controller has a broken fader and some features I don't really need I decided to build my own custom made dream controller. In the beginning I thought it can't be that hard because you can map all inputs in Traktor itself so I imagined to just plug some knobs, faders and buttons to a mainboard and I'm basically ready to go but looking a little bit more into it I realized it's actually not that easy... This forum and website is a little messy and I didn't find a good step-by-step tutorial yet so could someone maybe help me out by sending me a link?

Also if I want to plug a Cinch cable into the controller I need to use an additional soundcard, is that right?