Another good thing with the radial bigshot i/o is that it has a volume dampener for the second connected instrument, so you can adjust them to the same volume.
However, I sold mine, as I realized I have switching between instruments and that I'm not going to switch basses and do the in-between-songs talking as well. No-one in the audience is going to care anyway what bass I use. So I always bring just one bass, the most appropriate one for the gig. I use the fretless jazz only if I don't have to sing too much and the sound fits the music. I play mostly only supportive bass lines, not "lead bass lines", so it's not vital for me to use the fretless on any gig, but it's fun in the reggae band.
However, I sold mine, as I realized I have switching between instruments and that I'm not going to switch basses and do the in-between-songs talking as well. No-one in the audience is going to care anyway what bass I use. So I always bring just one bass, the most appropriate one for the gig. I use the fretless jazz only if I don't have to sing too much and the sound fits the music. I play mostly only supportive bass lines, not "lead bass lines", so it's not vital for me to use the fretless on any gig, but it's fun in the reggae band.