Has anyone worked on the front Camber, I just went though a set of tires

The only thing I was glad about was a rear flat that alerted me to this Danger

I had over a 1/4 an inch of tread on the outsides of the tires, but not on the inside
Needles to say New tires and a front alinement was in order. I was told that the front was in spec, and informed of the .1 neg. camber was built in for better handling.
Has anyone done a camber add on. I have seen allot of innovative adjusters on the web and in catalogs, Do they work? is there one that will be easy to install.
I will not be doing any tracking just allot of commuting (

) at lest not on the track. you know just spirited driving.
Thanks
Mike