Have been playing with the install this evening. Decided to put the fuel pump, ECU and bubble trap on top of the tank which in turn is velcro strapped to its seat like the smaller Hawk and Tutor. I've done this for easy access to the turbine behind. The whole fuel system and ECU can be taken out with the tank just by releasing the tank straps.

The air and PowerBox system is on the forward tray but still mounted to the rear fus formers so the fus can be split easily if necessary - this is a big aircraft !