My currnent layout was working great but not taking advantage of best tools and practices.
It was pure E1.31, one Master Fpp that drove many other Pis (One PI drove F16V3 w/Diff expansions,
some PIs drive HDMI TV's). Was stable and no sync issues..... Got very manual...
Upgraded F16 to latest FW so I could use ZCPP and eliminate the manual port and universe management.
Figured out ZCPP looks great but only if using Xschedule for the show. FPP's don't do ZCPP (yet).
SO now I fall back to DDP. FPP and F16 both support. I read in Xights that config info is comunicated but not how and when... A diagram might helpus all....