Second thought about some basic details.
1. How do you erase a track that you have recorded if you want to give it another "go"?
2. Can you create multiple versions of your solo like in a DAW without overwriting your first take?
3. I suspect maybe you can use those "utility tracks" as additional tracks to record on?
Excited to dive in. I think this might make a perfect practice tool.
1. If you want to give a take another "go", select the take again option that appears in the window when you stop recording.
2. Yes, this is possible regardless whether you are doing Sound on Sound recording in the Audio Recording Window or recording audio to various Mixer Tracks. Takes can be moved to other tracks or saved as individual files.
3. Absolutely. You can record on any BIAB Mixer Track. I normally don't use the Drums track in particular and I also avoid the Melody and Soloist Tracks if possible. They have special functions that may be necessary for some algorithm options.