I think this has been covered before, but I don't recall. Given the Carrier Level meter is a 1ma full scale meter, can any old 1ma full scale meter be used? Same goes for the Line Level meter (not sure of the full scale is for that one). Other than the scales and the physical size, is there something characterstic about these meters that make replacing them all that difficult? Thanks, Barry(II1/2) - N4BUQ