Hi Greg,

If you have an installation manual, there are instructions in the "optional items" section. That said, many people don't really follow those directions, and instead of the aluminum cuffs, elect to bodywork the fairings into each other and into the struts.

My fairing kit didn't include foam, but I used some left over foam to fill the area that you cut away on the rear strut to clear the fuselage when the wings are folded. 10 lbs seems like a crazy amount of foam.