  We determine which integral surgeries on a large class of circular chain
links bound rational homology balls. Our key tool is the lattice-theoretic
cubiquity obstruction recently developed by Greene and Owens. We discuss a
practical method of computing it, and, as an application, prove that a
generalisation of the slice--ribbon conjecture holds for all but one infinite
family of quasi-alternating 3-braid links. This extends previous results of
Lisca concerning the conjecture for 3-braid knots.
