Hole-y wall help

[ApexFPV 0]

Anyone able to help with this issue of the outside seen in the photos? I have gone up and down by 20 degrees, increased flow in cura by up to 120%, slowed the prints to 20mm/s, changed the nozzle size (Incase it was wrong) from 0.3 (which it is labeled) incrementally up to 0.5, I have used calipers to check the filament diameter and adjusted accordingly; all with the same results. 

 

Anyone have ave any other thoughts?

[ultiarjan 1,223]

what printer did you use?  0.3 nozzle is a bit of an odd one... and what settings?