My Drip Irrigation System, Part II: Repairing and Expanding

Wow Gordon, that's quite a system.  How does it hold up during the off seasons such as fall and winter?  There's a lot of little pieces and I wonder how many get lost and/or clogged during inclimate weather.  Do you set a timer on the water line to avoid overwatering/water wasting?  Where can this system be purchased? Seems like a good thing to have if you have the time to assemble it all and especially if it can lay on the ground through all seasons so that changes to the system from year to year are easier. Good demo.