I have a Lane Lancet MK8 regulator in my .25 Wildcat and it works fantastic. But from all the videos I've seen the Kral unregulated rifles get numbers over the chrony that are better than most regulated rifles. So I don't think the Kral rifles need a regulator as much as they need an accurate barrel, because the accuracy leaves a lot to be desired. If you want a real nice inexpensive pcp rifle, buy a Kral and install an FX SmoothTwist barrel on it...or better yet one of the new FX Smooth Twist X barrels on it! I truly believe this would be a cool project...uh oh...what did I just talk myself into this time?
Best regards to all