Hi guys 

i am have issues with my solidworks part/feature. 

My issue: I have a solid extrude and then added a surface boundary on one side and then used the mirror function the mirror it to the other side. after some knitting and a shelling, I went about cut extruding a hole through the top of the combined Surface boundary/extrusion, but i am now having issues. after the cut extrude, a couple of faces