December 2022:
A completely updated version of this pattern was released with the WotA Classics collection in November 2022.
In December an error was found in this version, in the worksheet:

The number that was supposed to be C4 was mislabeled as 3d.

The updated pattern (download from your library) has some other minor updates to the worksheet to help make it easier to follow.

2014:
See updated version in your library for multiple changes. If you have questions, contact Customer Service at 1(800) 574-1323.