Metadata and S2 arguments

pthalogreen made a cool journal style ages ago, which lists posts by just the music field. I wanted to see if I could do this in S2 and also wanted to include the new location field. And look, I did it! That's probably the most original thing I've managed to do with S2 so far, as opposed to just cribbing other people's code.

I'm still stuck on one thing: I would like to make the metadata page show 50 items per page, while keeping 25 on my main journal. Is this possible? I tried changing $*page_recent_items within the bit of RecentPage::print_body where I deal with the argument version of the page, but this doesn't seem to have any effect.