This is ABS, not PLA so 260 should be fine. It seems I have both the overheating z-axis controller and a binding bearing...so that's fun. The one is fixed, the other still needs to be dealt with. I am fighting a different issue as well however.
Print is:
ABS
.25mm layer thickness
.4 mm tip
80mm/s
110 on the bed
260 on the tip
It was a thin wall part with all wall thicknesses right at 1.2mm
Throughout the entire part (175mm) I had extremely poor layer cohesion. It never actually seperated, but it looks week and has small gaps. my daughter dropped it on the floor from only about 18" and it broke in half. Very weak print. I tried slowing the printer speed to 85% part way through and it seemed to make no difference.