I ordered the SD card right from Garmin to update the software on my 3- 106sv and 1- 126sv. They are all linked together. I have 2- 106sv at consol and 1- 106sv at bow and another 126sv at bow for livescope. So I can just disconnect the black box for livescope, power up all 4 units and insert the SD card in one of the units and it should update all 4 echo maps units? Is everyone happy with the latest Garmin update for the echomap units,?