Aluminum vs Plastic

[Megazone23]

Okay, I've been checking out all these awesome GorillaMaxx rides, and I am compelled to wonder at what point (if any) do you have too much aluminum?

I would think that optimally, you would want some of your chassis to still be plastic much for the same reason that you want some of the gears in your drivetrain to remain plastic. If something has to fail, you'd rather it be a less-expensive plastic part than an expensive metal part. Likewise, if/when you get into a nasty crash, plastic is a bit more forgiving that aluminum, which tends to forget its original shape after bending.

I'm sure racers would want the rigidity provided by aluminum, but I will probably never race since the nearest track really isn't that convenient for me. That leaves bashing. And bashing means hitting stuff. Usually hard stuff. Usually at a high rate of speed.

To that end, I've been thinking about a setup with a GorillaMaxx G2 chassis, aluminum bulks and diff cases, but then going with RPM's suspension (shock towers, body posts, upper/lower arms).

So what are your thoughts?