Mekton to Nadesico
I was going to go into a long rant about how hard it was to convert Nadesico for Mekton, but instead, I'm gonna make things simple.
All weight is divided by twenty, after the Mekton is fully constructed, determine MV and cost before hand. Be sure to apply modifiers, such as Reciever Engine or Super-Alloy before you actually divide. This allows your weight to generally fall within the normal Aestivalis range.
This is also applied to Starships, except that weight is divided by 10 instead. However, for the purposes of Mecha Bays, Cargo, and Passengers, consider the ship to be two classes 'lower' on the table. For example, a Light Heavy ship would only count as a Heavy Striker for mecha bay, cargo, and passengers, and a Heavy Striker would only be considered a Striker.