I did give a seminar on "scratch-building models" at the 2005 Mastercon in Troy, MO. I remember the seminar went over the 1 hour alloted time, almost lasting 2 hours. In fact, I also remember someone (I think Susan Letterman) came into the room and told me to 'end it' and they had to get the venue ready for the banquet and awards presentation.
It is kind of funny now to think about how all the seminar attendees and me had no sense of "time and space". Going over the time limit with the interesting seminar on scratch-building models.
You can ask Pat Stansell from MMIR magazine, to vouch for this story. I remember he was there.
That is a good idea bout the SBS with the P/E miniature motorcycle drive chain sets. I should take more detailed photos of the process with the next go-around, so stay tuned for that.