Go to the ACW. I tend to start in BB as opposed to RB but I suspect it's the same in either. Set the first bar using the L key and after starting playback, tap the L key to define the "0ne" beat in every measure. As you look at the project, it will be displaying the tempo in each bar. Now use the EQUALIZE TEMPO function to set the entire song to an even tempo based on what you perceive to be the average tempo of the song. This will stretch and compress the audio as needed to make everything fit to a predefined tempo. Now you can use this in either BB or RB or even drag it into a DAW which can line everything up perfectly based on the tempo.

That's how I do it. It works well


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.