I have a question about moving sprinkler heads. Simply put is it better to use a flexible tube/pipe and attach it to hard white PVC pipe, or to get fittings, and add a hard white piece of PVC pipe? I have to move these (3) sprinkler head about 15-20 feet. My thought is that the hard PVC pipe is the most durable, but the flexible pipe will allow for easier placement. Any thought on this would greatly be appreciated.