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Like VOS said no changes to your dish are needed. CSR's are not usually on top of the technical stuff. They will just install a SWM8 or a SWM LNB and rerun setup on your receivers to config them to the SWM. As far as moving the receivers a round should not be an issue. You can do it yourself before or after the tech configures your system to the SWM setup. I personally would just put the receivers where you want them after the tech completes the job.