tuff country 2" kit questions

Just to let you know- I searched and got 90% of my answers, but I have a few more that I could not find.

From what I get, lifts up to 2" you usually dont have a problem with caster, but over that its a crapshoot if you get it right. Thats the reason I want two inch.
Should I get a diff drop kit or would I be ok? I think I read somewhere that over 1.5" lift it was good, but I see alot of people that dont run one.


Also, do any of you by any chance have this kit?

Its going on a '11 reg cab 4x4

 

A friend of mine just put in a rough country kit similar to the tuff country kit in his 11 reg cab. Looking at his cv angles he could use a diff drop. For the $30 it cost its cheap insurance to keep the boots from wearing out prematurely.