Hi!
If a file of the 4D cinema, I can do this. But you need to specify what you want to change and just want the file Cinema 4D changed. If a file extension of "obj" can change it too, but either way I need more details to say how long I can do. In this case, I make the changes and send any file that proves the change made. after that, you get paid and your file. Fair to both. Accept my offer?