Howdy
Taking a Vaquero apart, New model or 'original' model is easy. Getting it back together again properly can be a bit challenging. somewhere between changing a light bulb and rebuiding a carburetor. Changing the hammer spring can be a little bit tricky too, particularly avoiding it springing into the next county when removing it from the hammer strut. Word to the wise, NEVER put your face directly in the line of fire of the spring. Safety glasses are not a bad idea. See if you can get together with a pard who has done it before. There are instructions in the owners manual for assembly and disassembly, but they are a bit sketchy.