The major advantage with these square Maxi-Tanks is that you can get more fuel into a smaller space than is possible with a 'bottle' type. The filler & breather are moulded into the forward recess which stops either getting 'kinked'. The diagram shows how the Tidy Tank Filler together with a 'T' Fuel Joining Tube (not included with tank) are used to pressurise the tank from the motor silencer. The lower line being the feed and the upper going to the silencer. Two extra outlets are also moulded in which, if drilled out, can be used for a clear plastic sight gauge. This could perhaps be let into the fuselage and covered with a strip of clear plastic. Including tank fittings.