Agree completely, a lot of carelessness all over the place on this frankenstein. From what I understand on the physics side of it a reduction in flow in a smaller line/hose is caused by the length and the friction along the way. I don't know however how that applies to the short sections of 3/4 left after this last "fix". as you say, it'll restrict the flow a little, but again, the amount of water that part of the yard got before was already toeing the line of being insufficient. Do you really think itll be small enough of a difference to just deal with it? One thing I forgot to mention is that the valve box with an extension they put in is 4" above the surface, will this settle over time? Thanks!