One minor speed tip when setting up the IKRig for a character… you can select and create multiple chains at one time (as long as they aren’t part of the same chain…). Meaning, say it’s the mannequin… you can ctrl-select left shoulder to left hand, and right shoulder to right hand, and left upper leg to left foot, and right upper leg to right foot. So all of those are all selected - then right-click to make the chains… you can blast out those 4 in one shot. THEN for fingers, same thing, Select all bones under a hand (meaning all fingers) and again rt-click and make chains. it’ll step you thru each chain creation. You could skip renaming, but then you may need to fix later in the retargeter… up to you really where you wanna fix 
What you can’t do is spine and neck together, as technically in the hierarchy they are part of the same chain so it won’t see that as 2 chains but it’ll make 1 big one - you need to do those separately… here’s an example (not mannequin but same idea): Copy Mixamo animations to your MetaHuman in Unreal Engine 5 #UE5 #animation #MetaHuman - YouTube
1 Like