Yes, I use drilling ONLY as a last resort. When deep rust has set in that is sometimes the ONLY way to do this. What I find especially annoying is that with some lenses the ring does not have threads (the whole front piece, sides and ring together, screw off) or even pops off (Canon 1.8/50mm FD). It becomes difficult to understand how one should go about removing the front in those cases. - David Lyga