Here's the link to the A1. The hydraulic lift adjusts the table up/down. When we bought the machine, there were going to be 3 who used the machine. Add in my 12 year old, and we have a full foot height difference between the shortest and tallest. When quilting, I change the height up and down an inch or two each hour. It saves my back.
Here's the link to the A1 site. If you go down the page just a bit, there's a picture.
http://www.800longarm.com/index.php