I don't set these out I just do them by eye using a round file and a triangular
then a small file connecting the 3 cuts up.
Here is the whole length of the bronze bar with cupid bows.
I have made it easier to bend by reducing the thickness of the bar with drilling
through the bronze, using a metal former the right width, cramping them into the
vice with a square headed wood screw going through the bronze into the former,
keeping everything central.
At a later date I will make the square headed wood screw into a round cheese
head wood screw as you can't buy cheese headed wood screws over here anymore.
Having lined everything up tight in the vice I am using a crow bar
to bend the metal a bit at a time both sides.
Here you can see the square headed screw in the back. It keeps
the bronze in place as well as leaving a gap from the jaw
of the vice to get the crowbar in.