Redskinema - Post if you're following to see final pics!!
Don't use Roomie, dunno.
The CineSlide triggers draw power from the source. About 10mA, which for most trigger sources is well below what they can do. As far as which control method works best on the CineSlide itself, either way works fine, RS232, trigger, or IR. You can use them all simultaneously if you like (last command "wins"). I would expect the Runco to be OK in that regard. I don't know what you are using to do your vertical stretch. If the Runco, then trigger control will probably work fine. If something else, it may get more complicated telling the Runco what to do to fire the trigger.