I had a "gunsmith" (I use the term lightly) do a trigger job on my 10-22, I hadn't shot it in years until this past week. I pulled it out to fire a few rounds and found that it double taps every time I pull the trigger. What parts do I need to replace to restore dependable firing? The seer? My first instinct is to purchase a new drop in trigger but I am currently putting back for another pistol... I would appreciate your input!