It looks like I'm dealing with some Z-wobble in my prints. I held up the prints to the threads and it seems pretty clear that the threads correspond to the wobble. I have the ATI kit which provides the Z-wobble mod that should help remove some of that. I've adjusted the rods so they don't bounce around much, just a little. They are in a flexible coupler. I'm not sure what else to look at.
Here is a picture of my last configuration cube taken from the side.
More pics of the same print:
It also looks like I'm smooshing the beginning of the print against the bed too much. I figure that is just a setting in slicer to move the initial layer up a touch. I think I saw something about that and maybe also adjust the setting in slicer that controls how much plastic is extruded to a slightly higher value.
Anyone have some other suggestions about where I need to tweak or what I could do to improve that Z wobble.