Im in 2 minds which version was closest to the original concept.
Mech 3 had the artemisIV ,upgradable AMS ,CASE , DoubleHeatSinks, jumpjets for any mech AND the MobileFieldBase. It included wieght limits for your stockpile plus your ammo was limited which ment that you sometimes had to ditch your favorite weapon due to ammo shortages.The damage model also allowed mechs to be disabled without blowing up.
The probem was it allowed corruption of the basic mech types. It allowed the changing of the internal structure of each mech and the placement of ANY weapon on any part of the mech. This allowed Catapults and Vulchures to carry AC20s in the misssile pods and All-missile supernovas.
It also allowed scoutmechs to carry 1 or 2 masive weapons instead of 4or5 small ones
Mech 4 fixed this by adding the colour coded slots of differnt sizes. But at a masive cost all the best features of the original were droped.
I still prefer Mech4 but I pine for the features of 3
which do you perfer??