Armour thickness could also be quite hard to measure, reason being I classify my armour on DB5 as 2mm Titanium but behind that there is 8mm Ally. This is mainly part of the chassis, but also acts as armour. Any ideas on how this situation would be judged if an armour thickness was enfored.

I do think some types of metals should be outlawed for a lower class

Agree no FP pneumatics should be allowed, also agree on the rare earth magnet motors should be banned in the lower class.