I use 1/4" SS bolts instead of the 1/4" clevis pins in the outside supports ... it "locks" the wings down better and prevents the slight "working" of the wings up and down.

If your wings have the support crossbar between the main curved tubes and the rear support tube they will support more wieght.

Sail Safe, Sail Flat, Sail Fast
HarryMurphey
H18mag/ #9458, Fleet 54/Div11
P19MX/ #86, CRAC