AH sent out a newsletter not quite a month ago and in the “Announcements” section they wrote this: “We are very excited to announce that we have been working on getting super-res level3 data into GRlevel3 and RadarScope. This will require an AllisonHouse data subscription and we are proud to be the only Super-Res source for GRlevel3. For those who haven't yet, use the level3 update link above to update to GRlevel3 2.90, which will get you access to the super-res data. You'll need to opt-in for SuperRes data by going into File->Configure Polling and checking the "Enable SuperRes when available" box”.
Looks like a Rob covered a bulk of this in the OP but I wanted to be sure everyone knew about Super-Res GR3 for RS. I was pleasantly surprised to see this for RS as I mentioned it to Gilbert a few weeks ago and here we are.