Few more details about his service, I've been able to uncover.........
He joined 26th July 1875 and was posted to X Division.
27.07.1895 146J posted to L Division as 181L.
10.08.1895 181L posted back to J Division as 198J.
23.04.1897 Pensioned as 97J (so it would appear that he went back to the 97J number, at some point between 1895 and 1897. Perhaps as a mark or respect to his Ripper days?).
I've still got a few more avenues to explore. But I think at this point I can confirm with a level of certainty that he didn't serve out his entire career in J Division as has previously been documented in Ripper lore.