As dd part p is normally out of scope, but 7671 isnt hence the recent requirement for fire proof fixing of cables in escape routes. Thats a 7671 req not a part p one. I doubt many will know or do anything different but those that do will. Im intrigued on PG's Spit system and have been looking into that, id prefer an air nailer but looks like he is way ahead and found the right thing.