^^^^
@ Mark
As you'll see from my earlier linked Review, I had extremely bad white worm too. You'll also read that mine are now powdercoated (not diamond-cut and lacquered) as I wasn't happy to go back to the ever present threat of the dreaded white worm disease.
Friend Greenouse had his Monza's refurb'd by A1 in Wolverhampton.....Read the Review thread and all should become clear.