Pawnbroker:
With all due respect, what for you is "really bad" as a pit, may not be so bad for a practical shooting gun -- which is what most VH guns are. The rivels are something else. I'd send the tubes to Kirk Merrington and see what he thinks. He may be able to hone, etc. and get you shooting at very reasonable cost... compared. An expert opinion is always worth the price.

Best, Kensal