Hi Steve,
I just knew when I saw the thread title that it must have something to do with you!
I'm glad you have finally found not one, but two cookers! What are the chances of that?
It's interesting to see the plug in elements- very novel idea. Have you tested each one with an insulation tester (Megger) yet? That's always the biggest problem with old cookers- leakage to earth in the elements.
Hope they all prove to be OK as I guess you are planning to put this into daily use?
Good luck
Cheers
Nick