Here is the real kicker.......

After performing all the same tests as I did the other day I & changing nothing, I now can't fault the system & would, if it was a first install FLY, wihout any question.

BUT, and its a big BUT, I know there is a ghost in this thing & I'm removing all my powerbox SRS units. I've got 3 for sale, anybody interested? switching back to letting Spektrum handle the RF link from here thanks.