Maybe an added benefit of a "Rudder Bungie Hold-Down System would be that the "helm" could be further forward on the tramp ... instead of holding the rudder crossbar ... thereby placing more of the crew's wieght further forward helping to keep the bows down

In Hobiedom we called it a "Texas Bungie Hold-Down System" ... you can make a quick cheap system w/ some spacers (you can use slightly larger nuts as spacers) and oversized fender washers installed on the lowwer rudder blade bolt and 7/16" or 1/2" bungie cord

(its called a "Texas System" because of the large jellyfish in the Gulf of Mexico that liked to kick-up rudders when hit)

Give it a try ... it just may work.

HarryMurphey