Watching these videos made me think this was a 4-piece band.  Is the new bassist just a fill-in studio musician on tour with them?  I can't figure it out?  He's in the new video which would lead me to believe he's part of the band.  However, it's only Grace, Matt, Scott and Benny on their website?   The band seems to imply this is a 4 person band too... hmmmm?