I decided to go for it and got the UG Mounts delivered and installed this weekend. I think there is a new version since this thread started, they do not fit in the case because the locking knob is too large and the plastic end cap cannot slide over it. Assuming a better replacement knob can be found as a replacment the mounting plate for the leg will need to be loosened at the other end and slide down a few inches so the end cap can cover it to hold it in place. This unit is being sold as a Kapex UG mount but it is really a universal mount, its 2 plates with nuts in between at 4 places to adjust the height of whatever fence you have attached it to, to the height of the item the unit is attaching to. This is excessive, if it truly is a Kapex UG mount then it should be one piece like the one it is replacing. The other downside is where the locking knob levers against is 1/16" steel with nothing behind it, you can keep tightening the knob and the plate starts to bow and then you can still go further, there is no positive stop and you don't bottom out ever which means if your not paying attention you will break or damage something which is a feature I might be ok with on a fixture I built but not great on something that I paid for. I will attempt to modify what needs modifying and happily use it as it will increase the capabilities of my saw but I feel this is not a product that is finished. Multiblades won't answer your questions about compatibility, ie... the end caps working with the product installed, and just say it
"may not work". Actually, they said it will not work so they were upfront about it. It was also a bit strange that out of all their products this one says "Sorry, we accept no returns on this item". Multiblades should also make a 1 piece bracket just for the Kapex that works out of the box with the end caps and charge me 200$ for it, I would have bought it. That's my rant, I'm happy I bought them just wish there was less work to do to get it to work properly. I hope this helps others in their decision making.