multiple icn510s and SD maps

[Scruge]

If I buy another icn510 which includes the USA maps as my current unit did will I be able to use my sd cards created for my first icn510 on my second icn510, Or will the second icn510 require its own sd cards. I was thinking I could save money on having just 3 cards. One each everyday card for each unit and then a floater which contained maps we only used for trips. I was trying to avoid a juggling act with the various maps a single computer and 2 sets of cds for every trip.

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