Thanks. I was using JNXSCALE to do this. This was the results:

JNX Scale Value: 14, JNX2IMG prompts about not displaying under 200m. Displays between: 5m and 200m
JNX Scale Value: 783, Displays between: 5m and 200m
JNX Scale Value: 839, Displays between: 5m and 200m
JNX Scale Value: 965, Displays at 300m only
JNX Scale Value: 1447, Displays at 300m only


I now tried JNXCustomizer, but the results are the same. I set it to 500m, but on the device, it shows form 5m to 200m, then goes to the "Worldwide DEM Basemap,NR :-(

I have all other maps disabled, but it looks like it needs this Basemap to display anything. With the basemap disabled, no maps display.