Here's the Excell installed. Sorry for the poor photo; I didn't realize the focus had shifted.

The second photo shows the exterior; the blue feed line coming out of the firewall next to the fueler, and the red vent line coming from the front of the tank.

That pretty much takes care of the front end. Now, to move back; temporarily install the receiver/battery/switch, get the wings assembled and fitted and aileron servos zeroed.