Dead useful in game, do not bother with upgrading the rokkit launcha to the kustom mega blasta though. You trade 2 shots at s10 for 3 shots at s9 and a hazardous test to hurt yourself. No rule for the big fat bomb either in current codex, just the explosives keyword to get the grenades stratagem. Not good enough, just say they've got the rokkits to your opponents RT: https://poa.st/objects/0d30e720-3f32-4bfb-8f3c-994ffcb18ab3