Update:
For Northpole: Couldn't do the tram "buttons" given their placement, so I have used a location trigger inside the parked tram. Then with the bots' help I have fake-brushed one of the tram openings at the point of rotation which bounces the bots back into the tram (use /mal_showfakebrush 1 to view the invisible floating 'walls'). Also restricted the cannon to cvops engrs and medics and opened up the bridge to both directions. Thats all the testing I have time for this week. I have
posted it for those who are curious.