We have talked about this before, when you weld a forging , what I believe a Campy post is, it becomes a casting, unless you anneal it. Castings are fine for a lot of applications and not good for others, draw your own conclusions.
As far a Cinelli stems on Masi's, I thought for a while Masi tried avoiding Cinelli parts and used 3TTT, a lot of us bought Masi frames and used what the shop had on hand, especially rims, Nisi, Martano or Fiamme.
Jim McCoin
Fremont Ca.