I am making a computer mouse case which I will 3d print. I made 2 curved surfaces with lofts, which I trimmed and thickened to make the side walls and top of the mouse. There is some overlap on the front of the mouse where the thickened part of one surface is overlapping and poking out from the adjacent face. I want to combine these 2 bodies into one and trim away all the ugliness before I proceed with the final details of the mouse. I get errors if I try Combine to merge them, or cut with surface to get rid of the overlap bits. I don't know what else to try!