A mate of mine brought me the above to have a look at - the first thing I noticed was that the bridge was back to front - the intonation screws were facing the pick ups - wrong

anyway i reversed the bridge and tried to set up the intonation, but it was still reading sharp on the 12th fret.

anyway i tried jamming along to a couple of my favourites -Rock of ages - Def leppard and track 8 Ac/dc on the Powerage cd.
It played perfectly - how can this be ?