Hello all, after travelling along the terrible back roads of Mull our sink waste pipe jiggled loose. We have managed to reattach the waste by pulling the sink out from above, but are struggling to re- fit the sink. One of the clips which clip sink to the work top has broken (which will now need replacing) but we seem unable to tighten the rear clip at all. Will we need to remove the cooker to get at this properly? If so is this a massive job?