DS2: Construction System Idea

I've been thinking about the differences between
high-tech and low-tech vehicles and finding a way to
make it matter "more" in game terms.

How about this: allow three versions of each chassis size. Low, Mid and High
Tech.

A Low Tech Chassis is a little cheaper, but loses two capacity points.

A Mid Tech Chassis is just like those listed in the book.

A High Tech Chassis is more expensive, but gains two capacity points.

The differences reflect the miniaturization that generally takes place as
technology develops. There would also be limits on powerplants and drive types
for each chassis.

I haven't worked out how this system should be costed, it's just in the rough
idea stage.

Any thoughts?