Media Check and adjust iso size

Aptoncd is a great tool but the one thing that really bugs me is it's inablility to change the size of the iso file for the cd. It would be nice if the program could check your recording media to determine if it's a rewritable cd or not and then adjust the size of the created iso file to fit the media. It could be done that way, or by adding some options in the preferences area to let the program know your preferred media.