Pumped more than a few bricks of ammo through my Ruger 10/22 since 1986, easily 100,000+ rounds. Now it's tired and misfeeds about 10% no matter how clean and slick I keep it. Advice and diagnoses abound. Suppose I could replace the innards piece by piece and hope to eliminate an undefined combination of flaws... But my repair and tune-up skills are more with used electric guitars than with semi-auto guns. I don't want to waste the summer (and money) swapping everything out and still have a sluggish 10/22. So, who's THE EXPERT in Portland to diagnose it one time, repair it, and make my not-so-trusty plinker fresh and reliable (fun) again? Thanks for any tips.