First off, I hope I have the right forum section. I travel between Seattle and Chicago twice a month and using the route feature of rfinder, I see there are 1200 repeaters along just one of the routes I use. The id4100a takes a microsd card that I used to update the dstar repeater list. Does anyone know if I could use several sd cards and swap them as I travel, rather than drag the laptop out and hook it up to reprogram the radio? I'm using the rt systems software. Thanks in advance. Tom.