bought a used 06 husky sm610 couple weeks ago. changed the oil last night, paper filter was fine. but when i went to the left side to clean the metal filter, i found a bunch of small particles on the screen and then when i looked into the hole where the 2 screens are i found this sitting in there. any ideas what it might be from? my first thought was from a timing chain guide? havent looked at the shop manual yet to see what plastic pieces are in the motor/trans.