After advice. I spear in warm central Queensland on the barrier reef. I need a new gun. Ive speared for years and have my own large boat so length can be anything. We target coral trout and red emperar occasional grouper or tusk fish. Fish range from 2 kg to 10kg. 40 cm to 80 cm. We spear between 3 meters and 15 meters depth. Im after accuracy over power, but I think a roller system is best. The most accurate gun ive ever used is a borrowed single roller carbon amrite. My double rubber Riffe (non roller) was also good. Tried several other guns and missed easy shots. A very expensive double roller Mannysub was lost recently but I didnt really love it. ANy advice welcome.