I've just finnished racing 4 weekends in a row with the MTX-4. The results are good, I've finnished 1st in 2 of the races, took a bump from the B to the A in another finnishing 4th and took 5th in the B at the FL state race.

Now for the repair bill.....
New Front and rear shock towers. (I make them so......FREEBY)
New Chassis plate......Was warped, but don't remember having any major hits.
Parts replaced....Front side pully 24 tooth....hanger wire wore it down.
2 rear bearings....on the upright
1 cracked front upright.

Overall, the cost of running the car is less than it was for my MTX3 other than the chassis.. I think the car is as durable as the 3, but has a bennefit of being a faster car.

I am still puzzled on the chassis. It warped at the two screws where the rear support for the upper deck and just in front of the engine. Looking closer, the battery tray and the two screw holes for the center bulkhead are so close that this might be an issue.

The stock rear shock tower was not broke, but had a warp to it. I believe that the carbon fiber used is componet grade and not the cross lay for better rigidity. The front shock tower was also warped.

After pressing the chassis back to shape, I am going to have it anodozed so I won't confuse it with any others, and I think that I am going to make some changes to the chassis since it is warped, the set screws for setting droop/downstops cut into the chassis, so I am going to drill and tap that area and put a 3mm screw at that point. Being steel, it will be harder than the aluminum chassis and should prove to wear better.

Also, I am looking at a way to build a carbon fiber piece to stiffen the chassis on the exhaust side of the engine. It would house the belt tensioner and attatch to the rear bulkhead. This might prove to be another cure for the chassis flex/warp.