Thanks, BOB. For the purposes of this jazz jam we want to keep the number of song form repeats open. I guess as a work around, I'll create a duplicate on the song consisting of only the final section of the original song and then an ending (with no repeats or codas). So, we'll play along with the original track, stop the track the end, and continue playing our ending as best as possible after the track stops. If our ending sucks, we'll play along with the new track. That should be fairly straightforward.
Bill