Whilst fixes tables have some disadvantages the fact that they don't move is the clincher for me. The first machine I bought was returned due to the tables not staying parallel. I'm sure a correctly engineered solution doesn't have that problem but in my opinion will always have the potential to go out of whack. Once setup correctly with shims and bolted firmly down the tables will take all kinds of abuse and stay true. The fence design on the Sedgwick machines is the biggest problem in terms of space. It's a big iron bar that sticks out. You can get around this by moving the fence every time you use it, or moving the machine. It's usually easier to move the machine or do what I did and cut a hole in the wall.