I have custom maps in my in game clipboard.
Too much fiddling in the game interface to get the right map up and then you have limited options. Probably if you like this sort of thing a wish to improve the custom map usability would be in order.
What I did was create custom maps and then create an app that allows me to change maps with two taps, and zoom and pan as with any app. So, I never have to fiddle with the AH interface, or take my eye off of whatever the focus is. You could even do this in something like Flash (Animate), or Game Maker very easily.
