Djm 1000 Traktor Pro 2 Cdj 800 Mk2

Hi all,
Right, got a question for you all!
The club where I reguarly play has upgraded to CDJ 850's (Woo!) and ideally I would LOVE to start using them as controllers. Now I've managed to upgrade them and setup the HID interface etc and had them hooked up to Traktor as controllers and they work perfect.
BUT
I would've thought that connecting them to the mixer via the RCA cables would be how the sound would play out, but no.. I still seem to have to route everything through the audio 8 DJ interface.
Now I've got a macbook, and it only has 2 USB cables. I dont really wanna use a USB hub.
Is the only option Ive got to use them as controllers only and use the audio 8 as the output into the mixer.
Or can you somehow use the CDJ 850's as a direct output from Traktor into the mixer?
Answers on a postcard! Thanks!!
And yes, I've used search, and didn't get anywhere. Thanks again.

Hi guys,
I have a few simple questions for the CDJ 1000 MK3, Traktor users.
Currently I'm playing on a DJM 800 / CDJ 1000 MK3 setup with CD's. I want to try out a new set up with a Macbook pro, Traktor NI Audio 10 and Traktor (scratch) pro > with the DJM 800 & CDJ MK3's. Before I buy the Traktor NI Audio 10, I'd like to know a few things:
1.
When I'm using timecode CD's, am I able to see and save cue points which I set up in traktor?
So when I'm going to a gig with, let's say, 3 cue points in a track, am I able to use them as with other midi controllers?
2.
Can I still see the waveform of a track in my CDJ 1000 MK3 when playing with timecode CD's?
3.
Is there a certain latency or delay in the CDJ 1000 MK3? If yes, is it bearable (in comparison with the regular CD mode)?
4.
When I record a mix with the integrated traktor function, will traktor pickup all the effects & other movements made with the CDJ & the DJM 800 when assuming I've correctly setup the DJM 800, CDJ 1000 MK3's & NI Audio 10?
>>>
Any answers are very much apreciated. Looking for clear answers for the questions above for a long time now. People couldn't give me exact answers until now.
Cheers,
Jerome