Ok so I created a file in sketchup with 2 wholes in the walls and Saved as .stl then opened it in cura ver 14 but it looks good when opened. But gives unwanted material when sliced and printed. It joins the two wholes, dont know why. It shows up in layer view, not normal view. I'm printing in draft mode .04 walls. Also side note. In cure I save in inches but when transferred over to cura, it shrinks the model tiny into mm. -2000%size