Do you sync other devices or softwares to Traktor?

If so, is your sync pretty stable?

I'm trying hard to change my setup syncing via midi or lan, but i'm having so many issues with sync so i'd like to know if someone else uses it on the everyday setup and could give me some advice!

The setup i'm trying to do is TSP2 (running master) with Kontrol S4 and Reason 5 on another computer.

I've tried syncing with a midi cable from the S4 to the other computers sound device (Kontrol 1) and also via LAN...

The result is that i still have to manually re-sync the Traktor master clock every 2 or 3 minutes.

I've posted something similar months ago but i still can't get to a better solution.

Thanks!

Specs:

Computer 1:
Macbook Pro on 10.6
Traktor Scratch Pro 2
Traktor Kontrol S4

Computer 2:
Macbook Pro on 10.6
Reason 5
NI Kontrol 1