I do it differently. I don't try to get the solo to play correctly in either BB or RB. I let RB generate the entire track and then export it to a DAW. In the DAW, I can edit, move, copy & paste my audio track clips as needed. I can also use volume automation envelopes to get certain instruments to come in or out at points in the song.

I find this to be easier for me and it gives outstanding results. The down side is, you can;t hear it as a finished song in BB or RB.

RB can be used as the final mix point since it is a DAW, it's just that I don't use RB in that fashion. My DAW is Sonar. All mixing is done there.

You can find my music at:
www.herbhartley.com
Add nothing that adds nothing to the music.
You can make excuses or you can make progress but not both.

The magic you are looking for is in the work you are avoiding.