Metal Extraction Potential Factor shows how much metal expected to be extracted.

e.g. 750 potential,
for 2m/s base extraction is 750*2 = 1500 possible metal to be extracted,
for 2m/s base + 50% overdrive is 750*2*1.5 = 2250m.

Count metal extracted for each metal spot.

MetalDrainMult = 1 - ( metal extacted / potential / extraction ), aka ( potential - extracted ) / potential.

MetalDrainMult = max(MetalDrainMult,0.01) to prevent weird situations.

Overdrive will adjust for best output, but need some seconds.

Its bugged currently. at late game some mex will syphon all energy. (or not?)

Reclaim metal is increased to 0.8 for wrecks and 0.5 for debris