i put it on the picture forum too if you change the spacers you change the caster they are for that but your quad is going to handle different
in the lonestar page is one page that is like a tutorial of how to do the changes and what they mean
btw now that I see you have upper a-arms with heim joints, you can change the spacers but you have to play with the heims to have the same caster settings setting and maybe clear the pipes
but before any adjustment try to find how to do it good and what the changes mean (maybe calling lonestar to have advice)
I think you can