Not much to say about it, I'm bored already. It does what it does. Our Apache has two internal ballistically shielded self-sealing fuel tanks. Fuel can be drawn or transferred from one or the other to adjust weight distribution. Activating fuel boost engages the rear tank cross-feed valves as seen here. Fuel transfer between tanks should normally be left to auto unless you feel the need to play with it. HTR flight model should take account of the weight distribution.
The most important button on this page is bottom right [CHECK]. This brings up the a sub version of the page where you set your bingo fuel status if you get an alert reminder in the UFD.