Hi Bastien,

A couple of observations:

For Zenith: The top and bottom plate alone would weigh about 65 kg. Add 27kg for disk and you are already on 92kg, without motors, batteries, tracks, and side/front/rear armour.

Trance: All armour including the 7mm front scoop adds up to 80kg. that is without motors, batteries, co2 mechanism, just metal alone.

If you are not sure about weights, go to http://www.micas.co.uk/calculator.htm and experiment with some shapes and sizes.