Hey RC,
Fandango works fine. The high crown of the tank takes a little volume out of the bottom of the bag though. I have the bag on top of the gas cap. The cap needs to be vented. At first i bought a vent for the hose and just laid the bag over it bending it forward. After a rough ride i lost the hose and ended up buying a locking vented gas cap.
I saw your other post about riders here in LA. I'm down here in the SouthBay. My bike is currently apart working on HDB handguards, heated grips and more agressive knobbies for the WRX.