Never used this feature before, thanks. But for some reason the fade time between presentation and normal mode is significantly longer when you use the keyboard shortcut vs. when you click on the menu item. Have you noticed the same?
...also I think this overrides the print command (?), which you might want to remove by doing a search for 'print'. And its a good idea to keep a backup copy of the maxinterface.json in case you make a mistake.
Finally, don't forget to add a comma to the end of the second to last line- "flags" : 3,
I included the comma by mistake in the first example but it wont be there by default. If you don't include it your drop down menu will disappear until you add it back.