The Load Track button for Deck B broke on my MIDI controller about 8 months ago. After a whole lot of hassle, I've finally got the controller back, fully repaired. This week I've remapped the layout to better reflect what I'm using Traktor for at present. It's fairly simple, but quite a bit more effective than my last one. The Pitch Bend buttons have been re-purposed to jump to cue points, or to change the loop length when a loop is active. Cue Play resets the loop length to 4 beats. Download the TSI here (may need to right click and Save As).
The Numark Stealth Control doesn't ship with a TKS/TKI file for Traktor3/Traktor Pro. I'm sure an official one will be released at some point, but I've got mine working just fine as it is. The only tricky part was the LED mappings, for which you can't use the regular midi learn feature in Traktor. I just mapped them out manually one by one. Attached are the fruits of my labor: