Re canted winglets increasing span: I recall a reported conversation
between a well-known competition pilot (WKCP) and purveyor of
modifications etc., and a competition official (CO), re some new wing
tips.

CO: It exceeds 15m span now.

WKCP: Not when it’s flying – the added dihedral from the wings flexing
reduces it to 15m.

CO: When you show me by flying between two posts 15m apart without
hitting them, I will let you compete with those.

End of conversation.

Chris N.