I too wish I bought a sawhelper stand. Right now I'm using both the Festool ug stand and the fastcap bestfence stand. Both are being used with my kapex and ug cart. I love the speed of the Festool ug extensions so they are used most of the time. The fastcap extensions are also nice, they are over an inch wider then the Festool ones and can be joined together to make it super long. The bestfence is heavy and takes longer to set up but once it's setup it's a killer system. You can't go wrong with either if you have a kapex, but definetly get the ug cart and ditch the fastcap stand if you go with the bestfence.
Dave