A few lessons learned...
- Clean the copper where you are going to solder.
- Make sure everything is dry. Damn near impossible to solder wet copper (although I've hear the MAPP torches will work).
- Before connecting to supply lines, dry fit and then put as much of the joint together as possible. Making a dozen some odd solders while standing on a ladder between floor joists, isn't much fun. The less soldering on a ladder, the better.
- Once you have soldered pieces together, the copper will be very hot and take 10-15 minutes to cool to the touch. Keep this in mind, when you tell your wife the whole thing will take "About an hour."