Not that it makes a lot of difference I'll admit but, the tanks are 78 litres and they are part of the wing structure and cant be left off (this aircraft was also a quick build kit). There are duel rudder pedals, not duel brakes because the design of the Van's rudder pedal system means you get duel pedals even if you dont want them. When you say it had 2 seats in it, are you saying it had 2 sets of cushions, because I have not seen it in that configuration and as you would know the seat bottom is the structure of the aircraft and cant be removed and the seat back is essentially a piece of formed aluminium that is hinged to the floor and can be removed literally in 10 seconds.