Just my experience here Bat . I installed Racetech gold valves and springs into a 2007 Dyna . The gold valves can be a pain in the ass as they need a fair bit of setting up , which requires they be removed from the fork leg and adjusted. Given the opportunity again I'd just have replaced the springs , likes been said. Know that Ponters bike with the Ohlins cartridge and springs is the bees knees .. but no idea what's involved in dialling that in to suit rider and riding style.