We had a flexi race yesterday so I set up 2 of the new C43.
I found them to be one of the better chassis I have seen as far as being flat. I was told that people have been finding small stress cracks in the rear of the chassis. where the ninety degree bends are. Found that on both C43's I have also. We run Hawk 7 motors, .720 tires and the RTR cars came in at 90 grams. Testing showed that they are a bit better then C25's. The material they are made of is very strong.
I did however end up racing my track record holding Mosette as it was quicker. This is on a 155 ft Hill Climb track. The car I raced RTR was 97 grams.
I am sure with a bit more tuning the C43 will fair better. I think that it will be very good on a flatter track, which it appears to have been designed for, as it turns quite well.
Time will tell.
I wish JK the best of luck with this new chassis.
GVP.