I always found the velcro closure of the spraydeck a hassle. Especially around the waist. I never got it securly closed. More often than not I fiddeled while floating with a reopened deck.
So I installed “pressure buttons” with a well defined opening and closure point. They seam to be strong enough to hold movement in the boat as well as wave splashings, but give way at a certain point of willingness (while capsizing etc.).