Epic DWxBBC!SherlockxRDJ!Sherlock crossover

[paintedame.livejournal.com]

I feel incredibly stupid for losing this wonderful story.
It's a crossover between Doctor Who (10&Donna), BBC's Sherlock and RDJ's Sherlock.

There was a clock that existed in two periods simultaneously which is a bomb (some sort of 'peace-bomb' or something?).  Each pair of Sherlocks investigated and were switched with their counterpart.  Thus BBC!John with RDJ!Sherlock.  Cue cultural (time period) differences!

The Doctor and Donna were able to make contact (a la Princess Leia hologram) and inform the pairs what was happening and how to stop it.

This story is complete, and I can't recall if I'd read it on either AO3 or FF.net (but it was certainly not LJ).

Thank you in advance for your help,

PaintedAme

**FOUND**
Sherlock Squared by scribeofelidae on AO3
(Thanks mick_gz!)