Looks like James is out of town until after this holiday weekend... Like April 2. So he's been out of town for a couple of weeks as has no way to confirm the delivery or return of the boots.
Which seems to be why he wanted signature confirmation so the carrier would hold it until he could get...
As I mentioned in the private message try loosening the tube screws holding it and see if you can just adjust the angle and then retighten it in the correct angle.
If not just tell Chris show him and he'll send out a new part
I see what you're seeing, but want to say those are not from any kind of running change that was made. Most likely one of two things happened... fixtures or machine setup wasn't done right or moved by whoever was running the parts on that given day those were made. Something was out of spec...
Man there's have been at least 4-5 variants I've seen. Like you said there are focal length variants, and windage knob setups. Like you I have seen those with the rear focus ring being two pieces. More commonly the one piece, but it seems to definitely have some variation.
Also, on the windage...
It's not too bad, but for the block and hammers, you'll probably need a spacer for the rivet puller to work. Without one the depth was too deep for my puller to grab the rivets and have them pull tight and flush to the bottom of the recesses.