Facebook group joined thanks for tip..
No dice on the roof down approach, its a prefab in block, and a) leaks, and cats get in there occaisionally (and die if i'm away on holiday as they can't get out!) .. not something i'd fancy coming back to..
Must do something about those gaps though.. could do without a cat pawing my roof!
Still bewildered by the tape deck.. at least i can play my ipod through a cassette adaptor!