I have beeen using the Harken Psycho mainsheet system on my 5.7 taipan but this system is not nearly psycho enough. These blocks are very light and have a low profile but I noticed a serious drop in performance after about half a season and after 2 seasons it totally exploded! I find it abit of a joke as this was very expensive stuff and lasted such a short time, does anyone know of other alternative products. For the mean time its back to the old school (20 year old) harken system.