Hi, have been learning how to form the endplates for a boiler, used a hammer to round the edges:
Attachment 32431
But then decided to make a forming tool
Attachment 32432
Made two endplates for the traction engine boiler
Attachment 32433
then drilled holes and made up 7 off 3/16" pipes using brake tubing
Attachment 32434
More info around the heat treatment is here
glue-it.com
The next stage is to make up the other fittings and silver solder it all together, Best regards, Nigel