Whoa okay no wonder I didn't remember it, it's from way back - nearly half a decade ago!
Thanks for locating that Anna, much appreciated
P.S. Okay having now read the thread again, Raellus' actually puts a figure of 1-in-4, i.e. one working radio for every three non-working radios. Given the attrition of personnel & equipment in the thread I don't disagree with the idea, 1-in-3 or 1-in-4 is probably a good average across the board given attempts to recover and repair but including the lack of spares and replacements and trained personnel.