After the initial design is decided, a more accurate pattern needs to be drawn.
I started out by using the measurements and drawing of the initial design. Then, I got the exact measures of the window and drew that in as the border. To do this, I subtracted the measurements of the original drawing from the accurate measures of the window opening to find the difference. Then, I measured that difference (16 cm) from the outside border of the original drawing create a new, more accurate border.
After this, I measured the width of the Zinc came to be used to frame the glass (8cm) and measured this amount from the original border and drew that in.
Then, I extended the design lines out to meet the Zinc came border.
These picture show the 2 additional lines and the design extension. I apologize for the orientation, but it seems no matter what I do, I cannot get these pictures to post in the north/south orientation.
This was a tedious task for me and took a long time. Notice the white out lines........