I don't know of a way to add a node but you can get more accurate with advanced bone mod I think. I have my gui open to b but set it to something and open the window with the character selected and adjust the acc from there.
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Both of these methods are pretty good, not as limitless as a node, but still better than trying to copy every ME setting. Appreciate it.Choose character, ShiftD, accessories, there you can do anything that you do in character maker.