I currently have a 211 and a legacy 4000. On the 28th an installer is coming out to install a DVR622 replacing the 211. My question is my current dish is a twin LMB and I also have a additional older dish that connects with a SW21. Just curious if that all will work with the new 622DVR. Thanks I just want to make sure I get what needs to be done when the installer arrives on the 28th