i got the box out by removing the upper fairing panels, both header pipes - had to chisel off the cheap crap bolts that had totally corroded away, then the centre stand and after a lot of wriggling and pulling and skinning knuckles got the sod off. i was going to try and get the studs out of the head as well but they are in solid and i dont want to break them.
phone my man who can weld stainless, he picked it up and 8 last night and brought it back at 10 - £25, job done.
if it goes again i will consider replacement but i dont necessarily want a nosier bike, quite happy with the soft burble
all i need to do now is get it all back on !!