I've been working with making a rig for about 2 hours, now, but just can't get past one issue. I had several issues with my rig, but then I used an automatic deform instead of an empty group and assigning all the vertex manually.
The only issue I can find now, it that when I move the fingertip bones, the fingertip don't follow the bones correctly. If I move the whole arm, or the forearm or hand, the fingertips move correctly with the whole arm, but moving the actual fingertip bones doesn't work correctly.
I'm guessing it has something to do with bone weighting, but I don't know what to adjust.
Here is a picture of the finger before moving the bone:
And here is one after moving the bone:
EDIT: I just found out that it only happens with the finger tips on the index fingers, all the other fingers are fine.