I've uploaded a couple of prints I tried today. You can see a banding effect on the venus model and you can see where I am with the overhangs. I sectioned it to 60, 65 and 70 degree angles but the smaller angles are much the same. Maybe someone who knows more than me can advise me on what's going wrong. I re-tightened both the x and y belts before both prints. Both were printed at 0.1mm, 40% cooling and 25mm/s. Trying a second overhang test now with the same settings but 80% cooling.