Closing the loop here and thanking everyone who responded. In response to Carcosa View question. I have had a number of issues with my RadCity Plus which, while under warranty Rad was great to address. My issue is that I am not mechanically inclined, so I need help getting parts replaced, which adds to the cost. Post Warranty my rear fly wheel broke and my tires had to be replaced, the UI display failed (which Rad replaced for free), and now the controller. I did not have to pay full price for the external controller, so that was much appreciated, but I did have to schedule a mobile service, which is pretty expensive as we don't have a Rad dealership where I live, and the bike shops wouldn't touch them for whatever reason. I sent a picture of the external controller and links to this forum to the service tech, and he called me back and said that he had never seen such a thing nor been informed by Rad that they had this external option. He said that he has serviced at 500+ Rads and this was a first. None of his other techs had seen it either nor had Rad sent them a heads up. I called Rad and they explained that they had been having a lot of problems with the original controllers, mostly related to overheating, so they have this external option now. They said that they also have a new internal controller, which I hope is what you got, that was redesigned for the downtube. My sense is folks like me who are out of warranty get the external. After almost 30 days of waiting, I finally got the controller installed this week and plan to take it out for a test ride to test it out when it stops raining. One thing that was really upsetting was how the controller was delivered. It came in a large box with absolutely no packing to protect it. I called Rad to complain but they were like "sorry we will let the shipping department know". The good thing for me, at least, the external controller is a lot easier to replace and I can mos likely do it myself! One last thing, in speaking to the mobile tech I asked him which ebikes he had to repair the most. Unfortunately, it was Rad but he said it used to be pretty easy working with them and getting parts quickly but now he (and other techs he is on with on a WhatsApp chat) have noticed a high turnover in the Rad staff and very had to get proper tech support. If under warranty they will just send you a part but, if like me, and out of warranty, it can be pretty frustrating. I really love my RadCity Plus and hope this will be the last of my problems for a while.