Don't waste your time...
The first decent trail you are on will show you how worthless these tilt meters are.
I bought a special one for my first lifted Cherokee and dumped it after the first trail.
It will basically max out each direction every couple of seconds and you really wont have time to keep your eyes on it.
Experience will tell you when you are going to far - usually when you are going down hill, off-camber, and the front shock is fully compressed while the opposite rear wheel is 3 foot off the ground is a good indicator
-C