Hi Blumbly, Yes I am starting to agree with you about my "extra" filtering. All my restores have the original tank filter but may be I'm being over protective. I have removed several of them due to fuel starvation issues. Live and learn ! All my VC160's have the fibreglass look-alike cowls and I think I've found the reason for the scraping - the starter mount bushes are the wrong side of the mounting lugs, raising the starter by about 1.5mm. This is how I found them but it was obviously wrong ! Will rectify shortly.
Cheers,
Wombatini.