there is some extra bracing as Jeff mentioned above, I had BMR Subframes added to mine and this required modification of the factory braces, the factory braces you can see in these pics, worst case is you will have to remove/reinstall them but I don't think you will
Audi dealer, convertible top, quoted me $10K in parts alone for repair, without actually diagnosing what the issue was, would not even consider replacing a single sensor that I suspected was the cause, they wanted to start replacing nearly every mechanical part in the top system....