Anotherairgunblog is an excellent and informative place to glean info for many airgun repairs and modifications. For the most part YouTube has allot of good info as well but you need to take care cuz a few of the people sharing ideas have no idea what they are doing and following their lead could cause damage to the gun, your body or those of bystanders especially when it comes to HPA pressured guns. Crosman has this diagram for the 130 in the support area of their site but they one from JG airguns is much nicer.
I used to have a life. But now I have the forum. I am a sick man?