I have a woodworking/plane building table with 3-3/4" mds sheets laminated together, which came out flat within 1/64". But I wanted a dedicated plane building table. A friend of mine in the medical field gave me a "stretcher" one of those thingies they wheel you out to surgery in hospital. The top had been removed, so I got the heavy duty base with 10" ball bearing wheels and 6" hydraulic cylinder that pumps up to vary the height.

I added a mds top of 2-3/4" pieces (2' X 4") laminated together with umpteen 1-1/4" screws-NO GLUE this time. Thought the glue might be causing some bowing in assembly process. This time the top is perfectly flat-added a 2 x4 base to stretcher with leveling screws so top can be adjusted to be perfectly level. All 4 wheels lock securely with one lever and height can be changed from 30" to 42". Also swivels 360 degrees and locks in position. Base is designed to support 400 pounds so the sucker is heavy duty but can be easily rolled out of the way. Next step is to find a heavy piece of glass to put on the top and maybe I will finally have a decent building table that is not in the way when another project is underway. Any of you meticulous buildiers have any other suggestions on how to use this unique item other than shop surgery.