I picked up a .25 barrel (350mm from Airgun Heaven) and will have some NSAs on order shortly for my Leshiy classic.
Here's to hoping it can handle/load/shoot the 26.8s the way it enjoyed the NSA 17.5s and 20.2s in the old .22 350mm barrel. I've shot the .22 NSAs out to 60 yards, and accuracy is well above "keep me happy". For reference, I am using the Huma plenum, and tuning is slow by most folk's standard- right at 700 FPS. I know what some are thinking, "why?"... but most of my shooting now is in WV looking out over Canaan Valley, and the EdGun domes and JSB Hades- as good as they are- don't buck the updrafting as well as the NSAs. I chose a bit more loop with greater shot-count since I no longer have squirrels to contend with.
My girlfriend fiancé used the last of my previous 26.8 .25 NSAs in the Lelya 2.0 and all I can say is accuracy wasn't quite at JSB Hades shooting to zero the scope, but over the range in the 50-60 yard shots were point and click. If you're shooting into or across the wind, nothing touches the NSAs. Lelya tuned at 830 with the Hades, I never put the .25 NSAs over my Caldwell.
RE: Airgun Heaven: yep, they ship to the US. They don't ship as fast as Krale, but well-protected/packaged. Very easy to do business with.