Spc control arm questions

I have a few questions regarding a set of used spc control arms I picked up a little while ago.

1. What version are these? I assume they are a very early design. Does this design have any issues?

2. camber adjustment once in, from my understanding the arms allow for +- 2 degrees of camber. If I leave them in the middle of the adjustment, would that keep my camber pretty close to what it is currently?

3. I’m currently on a 6” bds lift and my caster is around 2-2.5, if I set the spc’s to the f position that would add .25 caster is there any Reason this can’t work? What is the whole ball joint setting Measurement they talk about?

 

There's an entire thread dedicated to SPC arms. Wish I could find the link, you'll have to use the search feature.