Rear Camber Arm DC5 question

[2003dc5]

Hey guys quick question
As we all know dc5s when lowered increases negative camber in the rear. Looks like -3 camber at the moment. If I buy a camber arm that states -+4 degrees of adjustment and I want more negative camber does that mean I'll be able to achieve -7 camber? Or will maximum only be -4? Hopefully this makes sense...
Also installing rear camber arms shouldn't need a alignment as toe is not changed correct?

[Dxs]

You would assume that the +/- 4 degree is from the stock height. Lowering, as you know, does not change the top arm hight, and just due to the compression of the suspension geometry results in - camber. Therefore using an adjustable arm would result in even more -. You would probably have to map out the geometry to see what the -4 at stock would result in with lowered struts.