I now use C12200 H58 for plumbing at about 120 degrees celcius of application. but I got a problem. I have to anneal the tube first in order to make it easily bent. If I don't, the copper will be broken during bending process. Can I just replace the C12200 H58 copper tube with the softer one like OS60 or OS61? or can i just use the other tempered copper tube with lower hardness like H55? (nb:preferably use the straight like tube /rigid tube). kindly need your suggestion. Thank you.