I recently bought a Mark VI alto which has obviously been overhauled relatively recently and it's playing well, however, the pad on the octave key has split and needs replacing. I really don't want the hassle of taking it in just for that and thought I may as well replace the pad myself - unlike most of the others, it isn't going to need seating and I could get away with hot melt glue for now and then have it stuck in with shellac when I finally put it in for service. What do I buy, though? - I looked at Windcraft and the closest I can see is an 8mm leather pad but that sounds too large. Alternatively, there is a 6mm clarinet leather pad. But, surely, the octave key pad is a common item in its own right - I just haven't been able to find one and wonder how it may be identified?