I too have the Excalibur. I have the largest version that can handle
full 4x8 sheet goods. Unlike the previous poster, I've been very happy
with mine. Setting it up wasn't too bad and it hasn't been
"sensitive". I check my fence for square everytime I put it back on
and if an adjustment is necessary it takes all of 3 or 4 seconds. I'd
replace mine if given the need. I did a lot of research prior to
getting the Excalibur too. It still seems like the best "add on"
sliding table to me.

Neil