HI All I work for venue with multiple exhibition halls. one of our bugbears is the time spent accurately marking out halls for rigging points, stands, electrics , water and waste etc. My thought is that there must be a way that RGB lasers could be used to projected on the hall floor from a CAD imported floorplan. anyone seen this or something similar? LAsers would have to be hung from ceiling in a calibrated position and the CAD drawings mapped to each laser in order to cover the floorspace. discuss.