warped table frame

[Daniel]

your absolutely right lol i cut the side welds and got the top flat and now my holes dont match.

i may do something along the lines of Desertrider's advice and cut the whole middle section out then get my plates to on the 2 outside peices of tube then put the middle tube back in but weld some 1x1 3/16 angle to support it like so.

This is the best idea so far, you could had 2 more pieces of HSS or angle iron on the open end to stiffen the ends up. When welding small materials less weld is better then to much. And never weld square tubing across the face, it becomes a weak point afterward, when you joint two pieces of HSS you should weld only the joint along the corners Less warpage and weak point that way
Good luck