When they were testing out the needle bar tensioner they came by our shop and gave us some. We just swapped them out for the the original tube vise underneath. Works great.
I don't think there are any changes to the actual machine though. It's the same machine with a new tube vise/ needle tensioner.
They do have a new machine about to come out though. It's cool. I was helping test a few prototypes over the past 2 years.