Once again, thanks for your replies.
Like you all, I am puzzled with my results. Both films loaded on the spirals ok. The chemicals were fresh and at 38deg. They had 3mins 15sec in developer, 4mins in blix, a 3min water rinse, and 1min in stab.
Just imagine a correctly exposed and developed film with the usual fogged leader. Then completely erase all the images and name and numbers from the edge, and that's what they look like! On one film, looking very closely there are the faintest signs of a few margins and parts of some images.
As I have the equipment and chemicals, I would really prefer to try and get good results than "give in" to a processing house.
I too would be very interested to have the details to process C22 in C41. I'll patiently wait for the experts response.