Sadly not no, but the hole is not visable at all, so you could still put them back to standard without it being visable. You can make the hole qite neatly too and the ballast covers it as does the cover you make for the ballast. I'll see if I can dig out a picture another day, but Woorlord (think that's right) did an even neater version riviting metal plates underneath IIRC, have a search under his posts.