Yonny - that is brilliant!! Most check their hooks with a couple of pricks to their hands or nails... you check them in a laboratory!!! That is so cool!!
There'll be other updates before they go anywhere near the pond fella.
Just had them sectioned/mounted and hardness tested in my lab. They come out at approximately HV 670 which is very hard, yet not hard enough to be brittle, which is very promising indeed. No signs of decarburisation, they are heat treated very well.