Well I appreciate what your saying, but firstly ...
I am going to ride this beauty, and I sort of agree about the shimano xtr stuff,colours etc did consider that,but I have had all that gear before ! and fancied a change and something a bit different, the forks well I wont really know till I ride her wanted to keep it rigid.. but we'll see, I like the tanges and think they will suit the bike really well.. I can always change them if they dont feel right, Thats half the fun of building bikes, experimentation !!
The Ti stem and post, well I have used a Ti interface on steel bikes before and it just feels right for me.. personal preferences ... again its not set in stone....
if you want to have it rigid gte a fork w/ at least 425mm a-c distance.. trust me; you don't want to move your weight that forward w/ short forks like the tange. save it for another, older frame.
the mojo has the perfect balance. enjoy it like it was designed to perform.
vicious cycles makes such fork. i have one and it's not only beautifull but refined in feel like nothing else i tried and i have ridden good forks incl. fat chance and specialized doouble butted rigid unicrown.
LOL since 1959.