I need to photograph a collection of old documents that cannot be run through a copy machine. The documents are standard letter size and will be on a flat table. I need to get a tripod that has a column that will extend over the table parallel to the ground/table top. I have a Canon EOS30D. I have checked out the X series from manfrotto, the explorer series from Gitzo, and the Induro alloyflex. I have also looked at the Benbo trekker. I need to be able to hold the camera as far as possible over the table. Any ideas???