Topic: Options: Drive Assemblies

I know Perp has it's own unique look and all... scuttle scuttle...  but how about this:
Drive subassemblies which replace the 'legs' with other methods of locomotion, each with inherent strengths and weaknesses.

Legs: Bipedal, Legs: Multiple, Tracks, Wheels.  Drive assemblies do not change the 'leg' mounting points which are enherent to the mech's chassis.

Wheels offer the greatest speed, but not the greatest load bearing capability or hill navigation due to their very small contact area.  Useful for getting somewhere in a hurry but not so good in the field.  Due to the vibration of high velocity on poor surfaces their sensor acuity suffers.
Speed: +100%.  Load: -50%.  Targeting STR/Range: -30%

Tracks offer marvelous load bearing capacity but are the slowest thing since ... well, a brick and a rope.  They are also far less affected by the weight of mounted hardware.
Speed: -50%.  Load: +50%.  -50% modification to speed for the weight of equipped gear.

Bipedal legs are lousy on hills but less affected by the weight of mounted equipment.
Speed: +/- 0%  Load: -25% mod. by equipment weight

Quad- or more legs are faster, and the best of everything when it comes to hills, but are more affected by the weight of mounted equipment.
Speed: +25%  Load: +20% mod. by equipment weight.