Couple Q's about Bilstein 5100's

Just got my 5100's in the mail yesterday and have a couple questions.

First, I know Bilstein has done all the homework and math and what not, but is anyone else nervous about the size of the circlip that support the weight of our trucks? Can somebody give me a logical explanation of the physics that might help put my mind at ease?

Second, do the lift figures come out different for different types of Tacomas? I'm installing these on a Regular cab, 4 cyl, 5 speed. It seems like most posters here have AC's and DC's and get higher than advertised lift. Can I expect the same amount of lift or will it be less or more?

 

I just installed the 5100's on my 08 double cab about 3 weeks ago and so far so good. I was nervous at first about the size of them but I called bilstein even and they told me that there stout and will not have a problem so well see.