Chuck & All
Falerio's signature was on the frames when slotted chainstays first appeared on a Masi. With show bike frequency I think and different in execution.
Regarding the structural integrity, there was an American builder who's name escapes me, building in the 70's, that fabricated the chainstay bridge as a section of tube that pierced both stays and terminated at the outside. One could see through the bridge. Was for additional stiffness the owner told us, a few months later He was by the shop with the bare frame seeking a frame repair at the cracked stay radiating from the piercing tube. Probably too big a hole in that case, and easier to prototype than do a structural analysis. Perhaps the price of advancement, or attempt to.
Regarding the Masi twin plate crown, I like them for their additional fore & aft compliance, they are softer in ride, as long as the harmonic is not sympathetic,
John Jorgensen
Palos Verdes Ca