Based on your previous thread, you want your *initial* root to
1) avoid yellow triangle
2) avoid flash count
3) avoid using rooted ROM
4) root a ROM where there is no existing exploit
This is not possible.
If you are willing to concede on 1&2, then just ODIN flash any GB-based kernel repacked with CWM. They will work with any GB-based ROM. It will trigger the yellow triangle and increase your flash count. You will need to reset those by other means if you care about it. Either USB jig or upgrade to ICS and use Triangle Away.
Disclaimer: No touchscreens
were harmed nor injured during the creation of this post. GPS
units were all treated ethically and humanely.
Signed: People against misbehaving Nexus 7 2013s