Agreed that side pressure should be minimal, but why risk it happening at all? I've noticed that with the fences that clamp down just at the front, the single rail is much more massive than the Excalibur type with clamping down on both sides. Both sides clamping just seems more efficient. Part of my concern is that I use a wheelchair and with the width of the front clamping only type, the thickness of the rail would preclude a few extra inches from me getting as close to my work as possible. I've got quite a few years working with a tablesaw, so I guess I'm going to have to view the front clamping type in person and make a choice at that point.