I'm having to re-build a pair of I-struts for the-I'll call it the 'classic'- skybolt I'm modifying and noticed the builders manual has a 2 degree dihederal for the lower wings. My plans forthe 'S' have it at 1 degree. Since I have no plans for the 'classic' I'm wondering where the 2 degrees came from. Is that specific to the 'D'? Anyone have an idea about that or even better does anyone have a set of pre-Hale plans they could check? Thanks.