I replaced my injectors last month and now I have the old injectors laying on my workbench, mocking me, and I want to do something with them.

My main hobby is learning how to do things that I don't know how to do and since I have this old set of injectors now seems like the time to learn how to rebuild them. I've searched the forums and gotten a general idea but I need some specifics.

For openers, what parts am I going to need, how do I identify them, and where do I buy them?

Any recommendations on a tester would be great too.

Thanks