I did purchase one of these fences and it turned out to be one of the worst tools I have bought in a long time. The deflection on this set up was terrible. The four locking nuts all in a row holding onto a 42"-48" long piece of aluminum was not a very good design in my eyes. But I thought I would give it a try though. I did go directly to 80/20 and bought 4 other extrusions to use with this new head. But the deflection increased with the longer fences. I had a Uni back in the day, that fence was a good design and very stiff even though it used a aluminum fence, but the head worked as a backstop to support the fence. The T style fences are very tough, rigid and no deflection, even though faces need to be worked on here and there to get them flat with either stock or UHMW material.
Jeff did follow up with me after I made the purchase, I did have a issue with the locking handle not gripping to my fence tube, being euro and not quite 2x4 as most bies designs. We figured out how to make the locking knob work, but the deflection was still a major problem for me, not only for squaring up work but for safety. Jeff talked to Allen and of course it was me and not the fence design at all. I guess working on TS since '79 I have no idea how to use one correctly.
I did let two other buddies who own cabinet shops try this new fence, they both gave it back to me after one day and said no thanks, they both had deflection issues as well. It's collecting dust somewhere, Like I told Jeff, just another bad tool purchase business right off...