The threads for the set screws are incidental since the frame didn't turn out as flat as I would of liked. Would have liked to avoid them but without a large surface grinder to make everything flat they were necessary. Spatter getting in those threads is not a problem since I won't need to touch them again. With the holes I replicated the BuildPro table design. I actually find the large number of holes handy as there is always a hole nearby I can use to clamp a piece etc. As I'm not a professional welder the holes becoming clogged is not really a problem for me and anti spatter spray has worked well so far at keeping everything clean.