Hello. I'm trying to build 3d construction of tubes. The tubes in this construction will be welded. The problem that I've met is: I'm starting from the first tube, then I'm going from part mode to assembly mode and keep going to add more tubes, but the I can't make correct intersections of tubes. The function that I use is 3D sketch and Sweep, but that function don't give me the desired result - correct intersections curves. Does anybody met this problems and maybe anybody knows the tutorial about tubing construction except Solidwork's tutorial. Thanx.