I talked to a couple guys (Chris Forsyth and partner) at the US Open about different ways to fix warped or may I say cupped playing surfaces on 2005 and later T2000's. Here is what I have came up with.
1. Get some small blocks of 3/4" plywood. I used 9-ply baltic birch from Home-Depot. I cut them in 1 1/2" squares.
2. Drill a 9/32" hole in the center and screw in a 5/16" x 1" bolt.
3. Apply double stick carpet tape to the reverse side. Trim it with a razor blade.
4. Lift the lid on the table. Remove the backing of the double stick tape and place the blocks bolt-head down in the center of the ball return rail.
5. Lower the lid and push down in the center of the table between the 5-bars to make contact to the blocks beneath. Lift the lid and press firm the blocks that have adhered to the underside of the playing surface. If the blocks did not make contact with the playing surface, back the bolt out until all 4 blocks are adhered to the playing surface.
6. Using a combination of coins measure the distance between the surface and the man along the edge. On my table it was 1-quarter, 1-nickle, 1-dime, and 1-penny or .41 cents.
7. Using these coins as a guild adjust the bolts on the blocks until all the men are the same distance.
This took me less than 30-min to do.