I have 3 pro4's and I am having a large problem with Tweak....
The car will tweak if you hold the front and rear and twist lightly...
I can get the car setup straight then a just driving in a race the car will progressively tweak until the rear wheel is on batt side is like 3mm out... this happens with out a hit but a hit makes worse... car drives like a dream when not tweaked but this tweak thing is frustrating......
There are a number at the track that are having the same issues...
1 Came Australian Delivered and was in like the first batch...
2 cam Hong Kong delivered and have no idea what batch they are from.....