Maybe I am object-blind, but I had to use Google to retrieve your very helpful assembly instructions on my search for the correct length of the lead screw (z-rails minus two inches). Might be helpful to give that link a home between the assembly chapters above. Apart from that, I like the new site structure very much!
I will add that to the instructions somewhere. I will be updating them over the next few days for the new parts. The instructions you linked are from the old parts and I didn’t make them and can’t edit them.