One of my main questions for quite a while before I received the kit is what mount the extruder needed to mount it. From what I could find there were at least 2 that looked like the Ubis but they each had different dimensions. It's pretty much the same mount as a J-head hot end. It fits in correctly. I do have a bit of an issue with the 2 screws that pin it in place, but that could just be caused by the parts I had printed.
Here are the dimensions of it if anyone else is interested: