Ian,
Man, I wanted this one to work right... it flat "broke" my public-forum_summary.pl file... I'm sure it was simply something I did wrong; I probably interpreted the Find/Add After et al. instructions wrong in some place.
I got a "missing closing curly brace or square bracket missing at line 667 " and a failure to compile error.
I will start again from a "known-good" place later and document step by step what I do until (if) it breaks.