I'm sorry about that. It gets very busy sometimes and there just isn't time to do all the things I would like to do. My recollection is that I didn't even have a cartridge installed on the Sondek, so I don't know why I made that promise to you, and I never had twenty minutes during opening hours to sort that out. Apologies. My wife was exhausted (we arrived at 3am for a 10am show start) and she could not always stand in for me.
To be fair, I did conduct many a/b comparisons between stock 1210G and souped-up 1210Mk5/Blackbird. I was there to inform about my product - settling old scores between legendary turntable manufacturers was not a priority! I will try to do better next time, but it is a massive effort and I always seem to fall behind schedule as the show approaches.
If I manage to get a system running with turntable+Blackbird then that's the main hurdle. Interesting a/b comparisons are the icing on the cake. I'll do my best.