In two different sections of my Decision at Elst rule book (my operative RB for all SK games) I wrote - and then highlighted in yellow marker -
“No Resid—>Intens Fire”. Knowing me, I would make that kind of annotation for only 2 reasons: either I saw it confirmed online on a forum from what I would consider a “Credible Source” (YMMV), or one of my PBEM opponents communicated it to me during a game.
Damned if I can remember where I sourced it, though. If/when I can confirm it, I’ll circle back with a follow-up. That’s how I’ve been playing it, but as always, if I’m playing incorrectly, I want to know.