I have added some pics but the magnitude of the kart's beefiness is really not represented very well. In person it is much bigger  than it looks and has much more presence.

This is a pic of the rear wheel track. Currently it is just over 4 feet. It can go wider if bigger tires are in order. I think 55 inches is standard.

Do I need to say anything about this?

The Fizzer and the kart unaware that they will eventually be one

 machine.