According to the Braiins page, the R4 is supported. Their support has confirmed this and added that they have tested it on multiple R4s. I will have to try removing the 4th wire, thank you for the tip! Can it be reinserted without damage?
Yes you can reinsert it again if you want, in the exact same position it will click again and stay in the plug as it was.
Strange, I don't see the R4 mentioned anywhere in their documentation, web site, or first post of this Thread. Else i would have tried it on mine...