RE: music wire?
I have made holes through the block. Try to make them as tights as possible. Then pins are inserted (eventually with the help of hammer; but press machine would be better). Mine is soldered on downd part, but I think that epoxing them would be enought. Even if they are hold by pressure, it is OK.
It is important that you use hard steel for pins. Small ones are made from screwdriver.
Regards,
Marian