I started the day wrapping bailer twine around this ring to try and mark out the pattern. After much winding and unwinding of miles of string I gave up on the string and started to draw the lines freehand. This is very tricky and took me all day. Lots of scrubbing out of lines as they failed to meet the ones coming from the other side. Most frustrating but the pattern is on the marble and I have begun to etch out the lines with the disc. I am itching to see how the pattern will look.