The Pro 4 Jet knuckles are an extremely tight fit as regards to the bearing sizes, but they do go in.
The problem I had last night was that I broke the ball end which screws into the steering knuckle, and guess what, it broke clean off at the steering knuckle...so how am I supposed to get that out?
Other than that it was a good night, my PRP chassis was handling great and it was really quick round the sweepers...I wonder what it'd be like with a one-way in too