I am considering modifying my 36X48 table so that it can be raised and lowered to accomodate larger (taller) material. I have considered having the table slide in vertical tracks and placing four cams under the table that would be operated by a locking lever. I have also considered rigging up a threaded feed at each corner similar to what you see on a surface planer. I only need about 6 inches of extra room in the Z direction. Any other ideas would be greatly appreciated.