I changed from GPSMAP 496 to Ifly 740 and love the larger screen and other features. However, one thing the 496 had which I found very useful is the "Switch Tanks" popup every 30 minutes. I know that other wishlists have talked about including this in a timer function, but it should be automatic and not need any setup. When you first power it on, the timer should start running and at 30, 60, 90, etc. minutes issue a popup "Switch Tanks" until acknowledged.