For a complete list of parts, tools and a printable PDF of the steps, please see my blog post on the repair:
An easy to follow video detailing step by step how to repair a leaking Delta 1400 series tub / shower faucet. All steps of the procedure are shown including removal, cartridge replacement and reassembly. The video also includes information about required parts and optional steps you may take to improve the appearance of your faucet.
By following the steps in this video, with minimal tools (just a screwdriver and a pair of channel-lock pliers) you can save hundreds of dollars in plumbing fees by completing the repair yourself.