Old versions are old, they have known reliability and performance issues. 0.13.2 is vulnerable to DOS attacks (plus potentially other security issues, but I don't recall for sure), and it isn't getting updated for other changes so it will far further behind over time.   I would recommend at a minimum that you setup two nodes-- one on current software, one running your special code-- and make the one with the custom code connect only to the current software.  This way it's shielded from abuse that it might not be able to handle and it's easy for you to upgrade the external node.


As an aside, that address index patch that was floating around gave rare false results for me.  I suspect that it could lose entries when there were reorgs, but I'm not sure if that was the cause or something else.