Hello Pritch, thanks for replying. I think it is ShowCAD, I am guessing a bit like Max MSP (used it in Uni), there is processing behind and then you create an interface? For now I don't think I need to go in there, maybe to get the hazer hooked back up or find out what address it is sending for it. The splitter is a Showtec, 4 DMX output, three of which are used. Your explanation makes sense, the splitter is to give you better access to different areas instead of one very long chain. That correct? The light I replaced is an ADJ mega tripar profile. The others when on have 291P on the LED, looked like d162 to me but they were obviously upside down. But right way reads 291P with a flashing dot in one corner, I was probably expecting d for DMX. I can't find a setting on the light to give me a xxxP selection. I press setup on others and they are channel 6, I did this for the new one and no signal to it. No reaction from it. I will be honest, I am a little hesitant to dig into the others modes and setup incase I mess them up. Do I need to select a mode to get to the xxxP setting? Because they don't appear on the new one when I cycle through them. Do I need to copy the modes like the others and then the channel 6 setup button selection will make it work. If I understood what you wrote so it will operate like the others. I popped in there this evening to get some of these details. Will be working there tomorrow evening, to try and get it going. I can get more details if necessary, will be there on Saturday too. Thank you for taking the time to help me with this, much appreciated! Nani