Hi John and welcome to GTA:) Although I am not a machine shop guy so can not help on that level, I can say ..My son has a shadow just like yours and its a fine airrifle:) If tuned with a GRT 111 trigger I would concider it twice as good, and last a life time of fun:) Therefore I have never really worried about the warranty other than usually shoot about 500 shots first to see if any major issues. go for it, Tony:)