I bought a kill bag size is 40h x 60 long fits on swimstep perfect, ran lines with clips to cleats, so on / off in seconds. Only used it once so far it works great. No more scubbing fish hold, using sides for storage and center for ice.
A 40h x 80 long would work also. Can buy direct from Precision marine in Costa Mesa

Tom
26 Billfisher Utopia