Here's a link that has one of the plan sheets for the X craft subs.
Click here for the enlarged pic of the X craft plans http://www.heiszwolf.com/subs/plans/plans_WK202.jpg
If that link doesn't work then go to this link and then scroll down until you see the X craft sub and click on the word "here"
that is directly under the small pic to enlarge the pic. http://www.heiszwolf.com/subs/plans/plans.html
Hope this helps you.