Also with the case of engines, if someone wants to downgrade an engine, they may wish to keep their old engine instead of selling it for a reduced price. Therefore engines should be allowed as inventory. Engines are cross compatible as it is cannon that they were ripped out of old cars when the Innersphere lost its ability to produce them.
However: Due to the shape and structural design of different mechs, Ferro Fiber Armor and endo steel should not be able to be kept as inventory as mech shaping is not compatible. A jenner does not have the same steel frame as a hunchback, nor is its armor plating shaped the same way. If you take inventory by pure tonnage then you assume there is sort of magical reprocessing and remolding center in mechlab.
Also due to this fact the full price of ferro and endo should not be paid, as selling of old standard armor and standard internal should discount it.
Edited by ManDaisy, 31 May 2012 - 06:39 PM.