Thanks. My 4/4 has the radio aperture (with blanking plate) which is not leather clad. But using a rudimentary measure is 180mm X 50mm, however according to Bose the speaker measures 180x51. So think I'll have to get one using their 30 day return policy & try not to scratch it. Hope that 1 MM. is not going to cause a problem.
I asked a well known dealer how much for an after market radio fit. Ouch over a grand. Got to admit the sound from that little Bose is superb.
Thanks for the idea.