Strange, I have never
come across aluminium internal cabling within a house. If you mean tinned copper, well then that ain't ali is it ? If you are trying to tell the forum that fannying around with internal wiring, and also fitting filters on alarms increases sync rate, then you are preaching to the converted. I suppose the other option might be that you are the Ebay seller of that item, but what would the chances of that be, eh !