You cant really go too wrong building a smooth diff. You can wet dry the plates just helps reduce diff slip and flattens the plates (gets rid of high spots) but personally i dont bother with I trust xray have pressed them well for my touring car diffs

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People swear by schumacher diff lube and associated black grease and is what i tend to use. The main thing to made it smooth clean and keep everything flush and renew parts regularly. I tend to use carbide balls aswell theyre a bit harder and last longer than my kit xray ones.
You can also use a shock foam inside the outdrive which does help keep dirt out of the thrust lengthens the time of rebuilding the diff again.
I did use a tutorial from radio race car magazine where they did a step by step guide to building a diff was really handy. Think it went as far as having a slave motor attached to bed it in

bit ott to be honest.
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我听见 我忘记; 我看见 我记住; 我做 我了解 Chinese proverb: ''I hear and I forget; I see and I remember; I do and I understand''
Ken Block for the WRC title 2010