Hi there!
I notably own one and have had great fun and games trying to get the right sound for me, which I am now happy with.
1. Good option to look at Yani 92 Bronze neck if you want more refined , warmer sound (you may not!)
2. Agree about intonation and ergonomics - first rate.
3. Mouthpiece choice has been a challenge - trying to find the right piece to add body/complexity without reducing the dynamics. I have chosen a Francois Louis Spectruoso ML and will be getting a Pure Brass Lig to go with it. So probably recommend darker mouthpieces, witha degree of complexity as certain pieces can sound too thin - which I found with my V16 metal T77, and to a certain extent my Java T55 (others which were good - from darkest up - were Brancher HRL chamber, Lebayle HR Jazz chamber, Brancher Metal J chamber,Lomax HR NY & HR LA and V16 HR, with V16 and Lomax NY being very good pieces.
4. The T901 is a light sax, and for me needed a little beefing up/colouring in to get the best out of it, soundwise. It also is possibly at its best with more percussive reeds (La Voz seemed good, but prefer the FL mouthpiece with FL Excellence reeds (like DC's).
Hope that helps.
Kind regards
Tom 8) 😛 😛