Alan, as you've listed more caveats than a loan shark's agreement, how is the noise test to be undertaken i.e. at what revs, distance from exhaust etc etc.
Its all well and good stating that no refunds are to be given and that its the responsibility of the rider, but if one can't use road silencers or DB killers (which I can't & I suspect most if not all the DD'ers won't be able to) it would be useful to have some more info.