Work table repair

One of my steel top tables has had droopy corners ever since I bought it at an auction and it has been a real pain to use as a fit up table for anything large. The table is 58 inches by 94 inches the top is 3/8" tread plate with the treads on the bottom side, of all things to make a table top out of tread plate would not be my first choice, but I imagine whoever made it did like I do and used what they had available, the legs are 5inch square tubing and by the radiuses of the corners I estimate them to be about 1/4inch thick it has 3x3 x1/4 angle making a perimeter around the legs with 2 cross angles in the frame sectioning the length into 3 sections with a 10 to 12 inch overhang on each end and 8 inches overhang per side the edges of the 2 sides are turned down creating a 2 inch lip. Sometime in the past it appears that a vice had been mounted on 2 or 3 of the corners at one time or another this may have been the cause of the corners drooping as the middle of the table is nice and flat.
To repair it I made 4 jacking braces out of 3/4" pipe with a 3/4" bolt and nut on 1 end I welded the braces to the legs and the bolt heads in the corners of the table. Using a 4 ft length of 6" I beam 2 heavy duty C clamps and a 3/32" rod as a fulcrum I pulled the corners back up to the proper height then tightened the jack bolts on the braces to hold them there
While I was at it I added 4 1/2" to the length of the table by welding a 1/2" flat bar across one end
Attachment 42502
Attachment 42503
Attachment 42504
Attachment 42505
What I would love to do is built a new table out of a 6 ft by 10 ft 1" plate but who has an extra 5 grand now days to puit into a table? I guess I could if I would stop buying things like track loaders and trucks or sell one of them