Thread:Help talk:CirrusSearch/Inverting the scale of "prefer-recent:"?

I had been using catscan2 for the purpose of creating a listing of yet-to-be-categorized files from a very large batch download on commons, but the labs server has always been unreliable, and now the tool is disabled altogether. I was hoping to use the "prefer-recent:" search syntax with a negative scale factor to create a similar listing, but sadly, this doesn't seem to work. Is there any possibility that this could be added? It would double the utility of the filter. :)