BioWeston is formerly of the Boston-based Volcano Suns (New England's premier post-punk party band) and The Garfield Cadets (world champion drum and bugle corps).
Trainer is also Brick Layer Cake, a magnificent minimal rock band, and currently a member of Rifle Sport, the longest lived, least active rock band in Minneapolis. He was also in Breaking Circus during "the good years" and has played drums for Flour and other charity causes.
Albini has a closely-guarded, but apparently checkered past.
Shellac At Action Park is Shellac's first LP. Previously the band released The Rude Gesture (a pictorial history), Uranus and The Bird Is The Most Popular Finger, all seven inch 45s. They are all still available.