First, a big thank you for the response. I had not actually tried to use MapSource because of a number of things including previous attempts and a phone conversation with Garmin support. But adding multiple map sets in a single MapSource session solved the problem so I am very grateful. I now have a single map set with Arizona, Utah and Colorado all stitched together like they should be.
To simplify matters, and to make sure that I did not damage the existing 24K data on my Garmin topo card I used an SD adapter and connected a completely separate card to my computer and MapSource.
Thanks again.
To simplify matters, and to make sure that I did not damage the existing 24K data on my Garmin topo card I used an SD adapter and connected a completely separate card to my computer and MapSource.
Thanks again.