I have a Garmin Nuvi 260w. It has the US and Canada Road database loaded on it. I was wondering if anyone had tried one of the Inland Lake SD cards for the Garmin Chart Plotters on a Nuvi? If so, is the topo data usable? Are there any problems using the features of the Inland Lakes card? I would buy the card if I knew it works, but I'm willing to take a $100 gamble. Any info is appreciated. Thanks!