Congratulations, you did a beautiful job. I have a few SC radios waiting for restoration (I love SC radios) and I happen to have the table top model version of your radio. You need the original tuning knob to hide the screw of the band selector lever and I was very lucky to find one. Note that the two plastic knobs don’t belong to that radio. I also included a photo of a floor model using the same knobs (maybe my most desirable radio).