Hmmm, we have only one BMI chassis that I've seen and it's an x-ray.
I've been racing AE stuff for quite a while and here's my two takes on the TC-4
1. Rayhuang was right - this car is brand new and the amount of complaining about the TC-3 when it was new was insane. I know that I complained about it's brittle-ness a TON. I had just come from a Pro2 to the TC-3. . .
2. Not only did AE make some subtle fundamental changes to the suspension and chassis (weight distro, etc.) but they added a TON of adjustment possibilities.
What's the best way to confuse an RC racer? Give him new ways to adjust his car!
The TC3, orginally, didn't even have droop screws, remember? No way to change much of anything at all.
Now we can change kick-up, anti-squat, droop, cg, . . . . . . .
of course we're going to complain! We have no real idea where to start since the stock setup is obviously not right for racing. . .