Running sidemount with transmitters, still battling whether having a transmitter sticking out at 90 degrees from the regulator is mechanicly sound. Does the metal of the regulator (brass) and the transmitter (also presumably brass) give enough structural integrity to withstand the occasional inadvertent impact? For now I've accepted a bit of risk by connecting the transmitters with a 6 inch hose that i tuck under a neoprene tank band, instead of having the transmitter sticking down from the Hollis DCX first stages.