Gerry - there are no tubes. Just a different drill bit and a prayer. [8D] Thanks, Ed D. and Jim. I will say that this was as difficult as anything I've tried so far and I'm not totally pleased with the results. Ed B. - the jury's still out on this one. Some folks at work liked seeing the "guts", so maybe it will be a good discussion starter. Johnathan - for better or worse, this was a lucite block and not PR. If, and that's a big <b>IF</b>, I try this again, I could always color the inside of the lucite with dye and a cotton swab, I suppose.
Again, thanks for ALL of the comments!