Email the desk at connect@expertextrusion.com. There is no web contact form on this site.
Name the guide, the line that looks wrong, and the figure you measured when you have one. A link to a source helps.
What to send
- Corrections to a guide (see Corrections)
- Questions about a settings range
- A symptom you want filed under Troubleshooting
Notes
Please do not send private files you do not want shared. We do not promise a reply time.