Inlet manifolds were out of shape so I purchased news ones and clamps. My bike was already fitted with a k&n filter so I purchased a new one as the the old one was deformed.
Cleaned up the airbox and when trying to fit the filter could see why the original was deformed, as it fouled on the box when trying to fit. So I set the filter adapter to protrude 10mm from the filter lip and trimmed the edge of the airbox to provide clearance.
On disassembly one of the captive nuts pulled out, so I re-glued it into place with 2 part glue by filling the hole with glue, then using a bolt tapped it into place with a mallet.
Also started cleaning up some of the scratches on the side of the airbox using various grades of wet and dry.