Client has a small industrial unit with this old fire panel fitted. He has been advised that he needs to add a couple of smoke detectors and an additional call point. Now I see Firesafe are still in business, so question is what snags am I likely to hit if trying to add anything to this? I'm mostly thinking any form of password protection, although this seems a fairly basic panel. I also suspect this maybe 240V in which case modern parts may not be compatible? Or is it just far easier to replace with a new unit?