Asmund, fiddling around with cheap Chinese engines all the time must be distorting your judgement
The LA series is not known as having a liner peeling problem. We have scores at our field and there's not a single peeler amongst them. The LA series is one of the more reliable, consistent engines out there. They just keep going and going, many of them surviving several spectacular model-destroying crashes in the process. Remember, a good number of them are subject to the most trying conditions, typically being in the hands of the most inexperienced user segment in our hobby.
I suspect your LA .40 buddy may have suffered foreign object damage in his somehow, just like the YS .63 we recently saw at our field with a peeled liner. So, using your logic, why don't I condemn the entire YS line as being peelers, based on this one example I saw?
So enough of the "LAs are peelers" nonsense, eh. Yeah, sure, early FXs and the odd SF may have had more than their fair share of peeling issues but, sheesh, it's 2008 now; it's time to move on.