Ouch. I know perfectly how the Touchplates and Switches work (pretty easy comparing with ROTT3Deditor), what I was asking is if Gas events can be executed in this way: one Touchplate turns it on, then you must turn it off by another Touchplate/Switch. I know how to trigger Gas events, but only as a limited time trap. I was asking if there's a way to make it work like the way I need. The map is fully built and it works (excepts for the gas as the way I need to put it) successfully. I say more, almost the whole Episode 1 is built (the secret level still not). It's massive and such difficult that you'd think it's Episode 4 instead of Episode 1

(and not only for the presence of Monks).
I use, by the way, and exclusively, Rott mapper Deluxe (registered).
Thanks for the answer anyway, it's good to see some life in this forum at least.
Cheers.