you are quite right Linear Dodge is a simple l1 + l2 operation so plus, can't believe that slipped my mind i'm getting old DO'H, and there are of course ways to unpremult an alpha in PS as well it's just a PITA I'm not trying to put anyone of PS 
I've no real experience with fusion, but i hear good things so...
From a readers' Q and A column in TV GUIDE: "If we get involved in a nuclear war, would the electromagnetic pulses from exploding bombs damage my videotapes?"