I sometimes make a ending before the Biab ending by unfolding to 1 chorus and adding 4 bars extra. The first bar there play's regular then the 2nd bar I add a hold chord(Cmaj7...) at the second half of the 4th bar I'll add a shot chord if needed to end or just let the hold chord play through. I also will cut and paste the first bar of the factory Biab ending if it sounds better that way.