Hello,
Had a positive experience with Ed Krzynowek tuning my Beeman R10 .20 calber.
I sent my R10 to Ed after he helped me diagnose a broken mainspring. The barrel was also bent and the stock cracked. I considered the rifle a total loss.
Upon inspection, Ed said he thought my rifle was worth repairing. The short story is here are the results:
My test shots were shot at a target* @ 10 yrds with 4X Beeman Blue Ring scope. Notice the (4) JSB Exacts went in the same hole! I measured the hole in the target at "0.215" with my calipers! (Each dotted square measured "0.240").
Ed is compulsive about pellet rifles and will treat your rifle as if it were his own. Ed returned my rifle better packaged than how I sent it to him. At first I didn't think it was my rifle because the stock looked so good! Also included were all the parts he replaced, Inspection notes, and test results.
* Bob Friesenhahn's target design shown without his permission but I hope he doesn't mind!