Thank you so much for the quick reply!  Im trying to figure out if its something I can do myself or try to find a shop to do it-the video for the internal one doesn't look appealing to me and my limited mechanical skills!

Hi all - anyone purchased the new controller for the Rad City Plus 5? My 2-year-old one is being replaced with the new design/upgraded controller. It should be shipping out this week, but I got the following message from Rad support after my order "our controller is a new undated design and will install to the rear seat post with the mounting plate included". This sounds like an external one, or am I wrong? A link to the video was included but the video is for the old design, where the controller is seated inside the downtube. If anyone has installed the new one and can share their install experience (or post a picture) that would be great. I'll report back once I figure out what I am up against as the video looks pretty intimidating! Thank you