here is the inside of the bottom compartment with the tray removed. you can see the power panel, fuel tank, fuel pump and plumbing. the two gel-cells are on their side, under the fuel cell. I use the brass-geared fuel pump from Hobby Lobby as I have gone through one or two of the "cheapies" every season since I started flying! The Hobby-Lobby one is only $17.00 and is supposed to last and last and last... (the jury is still out as it is brand new, but I like it so far!)

Astrohog