The seals in the kit I purchased may have been an after thought, or knock-offs; they could be easily be installed and removed with fingers and had the flexibility of an old inner tube, I wasn't going to use them. The Kibblewhite seals have demonstrated all the right qualities and are noted by one of the best, if not the best, Norton engine builder to shed his grace on this forum. I'm sure that I could find a topic to argue with Comnoz, but it would have no Norton content.
If I'm going to pay a top shelve price I expect the part(s) to come with an overwhelming amount of peace-of-mind. When this engine is finished I'll have the bandwidth to worry about something else.
Thanks for the information, Fred keeps a stock of good stuff, but I'm not willing to buy it in the hope that the seals will work when I can make a similar purchase and know that they will work.