The webasto roof we put not soo long ago...But we found a guy here in Brazil that had this Britax webasto roof, but not installed, just for study (He designs roofs to), He just fitted new type of metal to the structure, so them, no leaks, no corrosion...

The only issue with the sunroof is that he didn't had the air deflector...So in a Motorway, it gets a bit noisy if you leave him open, because of the wind...But noisy issues isn't a new thing...We had to put a silencer some time ago, because when you were riding, the noise was very very loud, So noisy that one time a Ferrari was next to us in the Motorway, but we couldn't hear the Fezza noise...We couldn't even listen to the radio with the window closed...The Mufler Today it has now a silencer...But because spare parts for Mini here are a rarety, the silencer is actually from a Asia Motors Towner...So it makes a very unique noise...

Here is a video from him after the introduction of the silencer...
YouTube - Mini 1275GT 1973 (3)

Hope u like

Sorry for the English