Today, I just finished packing up my Kahles K525i 5-25×56 and sent it off on its maiden voyage for repairs. So my scope is on it's way to Kahles/ Swarovski Optik US office in Rhode Island and then will be sent to Austria for repairs. I had it mounted on my AAA Evol 30. After 2 weeks of owning it, it would go out of focus when adjusting the magnification up pass 18 power but would go back in focus when slightly adjusted down in magnification about 1/8" of a turn.
I feel a little disgusted after spending the kind of money I did and then a problem occurs. Don't get me wrong. I love everything about the scope and Kahles/Swarovski Optik has been great about the return process. Scopes are precise instruments and even "Tier 1/Alpha Glass" could develop problems. I've heard of even the best of the best such as Tangent Theta, ZCO, S&B having problems so maybe I shouldn't feel that bad but I do.
I won't be steered away from buying quality glass but I have to keep my expectations in check. What surprises me is how good some of the newer scopes coming out of China are. They've really come a long way. Nothing last forever. Buy what you can afford.
For the meantime, my Athlon Cronus BTR G2 4.5-29×56 now sits on top of my Evol 30 until my Kahles K525i comes back from Austria.