Hey all, I just installed the DIY Vortek Pro guide2 spring kit in my RWS 48. Can you say awesome! The gun sounds different, feels different. The twang is gone, along with most of the vibration. This was a pretty straight forward install. I need more time shooting it, but I did manage to get a hundred shots or so off between rain drops today. My groups did tighten up a little. I'm still a newbie at this springer deal but having a blast. More later. Jim