Posted by: LeeG on Mar-20-13 9:07 AM (EST)
The sloped transition from the tapered core floor and between the ribs has a doubled layer of cloth that is quite rigid.
Foot brace rails are installed on the core ribs through a 1"x2" aluminum plate and two rivets so the core ribs themselves are a prefered anchor point.
Seems to me glued or glassed in d-rings in 3" diameter patch will be spreading the stress around well enough.
Nothing like calling Wenonah