I think there are a few of us U.K. people who have been asked to buy. Expect to see quite a few available soon I’ll buy as many as my local shops sell.
3) It has been explained that security measures used by Matt to print the private key? Has it manifested itself in any way, or has it said that it does not keep behind these private keys? I would like to know if there is any url where I talk about it ...
Usually security measures are not revealed, thus trial and error is the only way. Finally, The only way to truly know if the private keys are there is by destroying the piece.