[rules-users] Ruleflow: two flow exits (or equivalent?) from reusable sub-process?

Hello list, I modeled (v5.3) a reusable sub-process which can either finish in a desired state (i.e. validations ok) or an undesired state (some validations failed and I need to route to a different flow). Ideally the sub-process would allow for two outgoing connections, but as far as I see that is currently not possible. Can anybody advise on how to achieve a similar functionality? Is there a chance I could build a workitem that extends the reusable sub-process but allows for two exit connections, and if yes, how? Can signals or fault nodes achieve a similar effect and if yes, then how? Thanks in advance, G.