Is anyone looking to build a cage that will hold the rear seat? I am a speed and handling guy, and I do not know whether I want to buy the max or not. My 5yr old would be the only one in the back seat. Can anyone who test drove one of the MAX and 2 seater shed any light on what you will be losing? Is it even possible to add a seat to the two seater? I just know most of the time it will be me and one other, however I am wanting to get my son started which means mom will want to go to. Any info would be greatly appreciated...