They are not really Rock files. They are any chuck files. I made the hole bigger for the other chucks but it is still for the CT also. A sort of one size fits all now. Usage will be different for each type of chuck. The CT users can install and forget. The Rock users will probably have to pop the window in and out. (Unless we find a way to fit a cup in. Dimensions required!) The QC users are in the same boat as the Rock users except they may have to take the outer plastic cover off of the chuck. (I have not tested the QC yet since I have not heard any interest.)