How about a timeout period (default = 0 means inactive) but after say 10 seconds of replay action time with no buttons touched then the 3play reverts to live so all I have to do is hit Mark Out / Goto In (single button) and then player when I come to the replay.

I put this in another thread but just in case it gets missed there.

80% of my messed up replays are because of the above and forgetting to press live.