I have cheap 2nd hand tables for my maker space so it didn’t hurt me to lay painters tape under the edges of the M2 and use a sharpie to Mark the table next to the existing 4mm holes in the frame. Then a 5/32 drill bit (I sized up actually for a little extra clearance) cut thru the table top like butter, trying to keep the holes vertical. I cut the all thread into 6” lengths and bent 1/2” into a hook on one end with a vice and a hammer. Hook the hole in the M2 frame and slide the other end into table top, secure with washers and wing nut. Now I have 3point tie down and the force is applied straight down into the table thru the frame. It works great
, now I need to upgrade to the new 4point spider.