OK guys, I just got off of the phone with Tekin. I called to ask about the R1 pro, and I was told that there were revisions to the manual and those revisions are going to include reducing the max voltage to 3S lipo. Their testing indicated that the R1 pro is not reliable at 5S and 4S was questionable. This was not due to the bec, but the controller section itself.

I thought that we were having a pretty frank conversation, and he seemed to be pretty open about the limitations of the R1 Pro and in short the bottom line was, don't run the R1 on 5S.

He did say that the R1MT would be out soon, although he wouldn't elaborate.