Instead of the conductor I set the chorus to repeat 3 times.

To start, use
Ctrl+2 on the numberpad.

This starts the song from the beginning and will loop the 2nd chorus for solos.

At some point when the solos should end, hit 1 on the numberpad and it with continue on to the 3rd chorus and on to the end.

Some people buy the USB foot switches to hit these two key combinations with their feet.