Option for fantasy mecha(by Mika Peltola <mpeltola@hotmail.com or
mika.peltola@keso.fi>)

-Mecha scale lances: Calculate weight modifier using mechas Arm ST and
scale-up lance normally, but for damage use standard lance rules from
Basic set (p.136), instead horse ST use mechas Body ST (with quite
devastating results if you have fast mecha, and for high-tech lances
adding vibroblade option in lance might prove worthwhile.)

-Enchantments on mecha scale melee weapons: simple multiply enchantments
energy cost with weight modifier, For example 12x Thrusting Broadsword
with Puissance +2 and Accuracy +1 would have total energy cost of 15000
(points of mana and mage-work-hours, or bit over five years of works with
8h per day); of enchantmens themselves; Puissance and any other diretly
damaging enchantment scales- up normally (calculate the bonus differently
and add it to the final damage.)

-Enchantments on mecha scale shields: Multiply enchantments energy cost
with (shield area/25)

This one is purely optional (use it if if you like it, it may change game
balance a bit):

-Mana engine as powerstone recharger: If mecha has mana-engine with some
excess power and has a powerstone installed (any type is fine, but it must
be integral to mechas design, and personally I would prefer use of
dedicated or exclusive powerstones, because they are highly efficient for
their limited use.) If both requirements are met then powerstone will gain
extra points of fatique at rate of 1 fatique per 3600kW of excess power
per turn, but because situtation like this is unlikely (due the weight of
mana engine at any TL), the alternate formula is 1 fatique per
(3600sec./Excess kW), So a Mana engine with 5kW excess power charges
powerstone at rate of 1 fatique per 12 minutes.

NOTE:  The real problem with this is that, because the powerstones charge
naturally very slowly (the example mana-engine charger is 120 times more
efficient than normal powerstone in normal mana area, and mana-engine do
not seem to be effected by the varying mana levels...), this would
propably lead to some kind of "industrial magic"...(Hmm. magical
renaissance.)