Tips / tricks / warnings for adjusting installed control arms?

JeepZilla380

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Atlanta, GA
As soon as I find some time I need to shorten up the installed length on my front lower control arms, and maybe the uppers. Post install alignment I'm stilling at around 8 degrees of caster, so I need to address that, and keep and eye on my pinion angle at the same time. Any tips, tricks, warnings for tackling this job?