Does anyone have any info on how to adjust them properly?
Model is ERV 3 for a Remington 700
Their website is tragically lacking info

Call them directly and they will talk you through the process.

Have the proper Allen wrench in hand and the trigger in front of you ready to be worked on - he won't wait for you to get your stuff... so be ready to do what he says when you contact them. They made it very simple for me to adjust my RB trigger on my REM 700 in .204.