They weigh 27 kilograms, the Nano 300 weighs 11 kilograms. My MoXF is just 7 kg. Extreme differences, that's why I keep saying it's a different type of system which you can't call lightweight.
Using a Rock-n-Roller kart solves all weight issues...
just sayin'.. every PRO should use one..
http://rocknroller-multicart.myshopify.com/