  Event-Shape Engineering (ESE) is a tool that enables some control of the
initial geometry in heavy-ion collisions in a similar way as the centrality
enables some control of the number of participants. Utilizing ESE, the path
length in and out-of plane can be varied while keeping the medium properties
(centrality) fixed. In this proceeding it is argued that this provides
additional experimental information about jet quenching. Finally, it is
suggested that if ESE studies are done in parallel for light and heavy quarks
one can determine, in a model independent way, if the path-length dependence of
their quenching differs.
