How do you cut a block of copper into the size you need, and you can't use the saw?
It is not necessary to drill holes, or the original part can be directly welded on the side of the copper sheet. You can buy a hand, with about 1mm bit, drilling can also be manually. If you have the power to use a steel cone, you can also taper out of the hole, but it is very troublesome and dangerous. The copper skin slips. From the size of your PCB, I think it's OK to solder it directly to the copper skin.
Whether it is plated with rosin is not very strict, mainly to protect the copper wire from oxidation. Polish it with sandpaper before plating, as long as it has a metallic luster. In addition, after plating rosin, the original welding easier, flux well. Heat the rosin house container and brush it with a small brush.
There seems to be no other way but to use a saw. Be prone to。Iron chloride can be purchased at chemical stores. Iron trichloride will do.
