I have a couple of Josh Tikka prefit nut barrels, its super easy to change, you just need a barrel vise, the nut wrench, a torque wrench and the GO and NO GO gauges of your caliber. You can change barrels in less than 10 minutes.
Looks great. How difficult was the original barrel removal? That's what is holding me back from trying this. I've herd it can be very difficult.