Converted Stock Radio and Ashtray Mod Question

[New_70'C10]

For your cup holder can you fit it in an old ashtray? Maybe cut the bottom of the tray out and mount your beemer transplant to the inside? If the one you have works the same way as the one in my wife's ride does there have to be room underneath for it to "unfold" once it's extended? If you go with the piano hinge and simply fold down the faceplate will this give your apparatus enough room to operate correctly?