Before you get caught up in the cult of weight weenie please read this....
How Lightweight Do You NEED Your Bike To Be? It may help put things in perspective. I used to ride a MAZA (no not a MASI) that was made with TSX by a small Italian shop run by two guys (Mattioli & Zanasi...thus MAZA) rumored to have worked for Ferrari. It had a killer Italian paint job complete with engraved BB, lugs, etc. This thing was beautiful. I had outfitted it with Campy Athena friction gruppo. This was back in the 80's. Then I stopped riding and didn't get back on the bike until about 10 yrs. ago. I was then 58 and the world had changed. Indexing, sloping TTs, etc. I convinced myself that I needed a new lighter bike. So, I sold my MAZA. To this day that was the single worst decision I have ever made with regard to cycling. It's painful for me to even type this out. Just a friendly warning.
This is the only pic I could find on-line.
https://www.google.com/search?q=maza...ml%3B800%3B600