I ran the beta version of the Cure 5 in my EGO11 for about a year, and it does make a difference IMO. Changed the sound sig a bit (quieter) and increased efficiency (due to orings) and allowed me to put a softer feel on the gun when tweaking with the dwell and SFRs. It doesnt make a huge difference, but it is noticable in some ways. Had a lot of folks tell me my EGO11 was the smoothest they had shot, so maybe it was all the bolt!!