Fixing deformed bends

Hoping someone can tell me what I'm doing wrong here. I am working on a character that I've done extensive sculpting on the G2F base figure in Hexagon. One of the mods was to shorten the figure and make heer more compact.  So, after bringing it back into Daz as a full body morph, and trying to pose it, it went all silly putty. Poking around, I found that the bones were not in place, and I spent some time moving them back into the relative positions and resizing them a bit to fit.

So, now posing works pretty much as it should, but I am getting deformed areas at the elbows and knees, and a bit at the underarm. I'm attaching a screen cap. Can someone clue me in on how to repair this?

Thanks!