So you want to change from frame quilting (moving the machine) to table quilting (moving the quilt)? Sorry, I missed that! Thought you wanted to frame quilt sitting down.
Just want to mention that table quilting can be hard on the back too. Be careful about the ergonomics of your new setup. I think distance from needle to front of the table is important. Might be worth measuring a Sweet Sitxteen setup to see what distance those are set up with.