sorry for the extra post !! But I'm exited!!!
Ok, I tested some. What works is to place a touchplate on the same sector where the player starts. That turns the End-Level sector Off. Then another touchplate or switch can re-activate the End-Level sector, whenever. It does not seem to work unless a given switch was activated at least once, no matter what type of switch I tested it with or which start-up setting.
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I tested with all switches types and on/off and I could not find a method to synchronize the screen prompt with the true state of the End-Level sector.
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The simplest solution might be to switch the quote 4 and 8 in the User.con file, if it is only for a single map.
Bottom line – many thanks dude, I can't wait to fool some of the Old School Dukers with this.