Rob demonstrated the differences between how and when to use a spiral blade instead of a traditional straight blade.   Hard core straight blade users in the audience found that once they tried a #00 spiral in lieu of a #5 straight that they could cut complex fretwork and lettering much faster.  Everyone in the audience got to try their hand with each blade on a supplied portrait segment.  Even some hard core turners got in on the act in preparation for upcoming Christmas ornaments.