Ya know, I don't even remember. I know I did a lot of experimenting with string gauges but it's been forever since I've changed the strings on that guitar. Next time I do, I'll let you know what I use.
Yeah, some other threads on seven string acoustics here suggested going to Just Strings.com and ordering a set of six plus a single string. I'm leaning that way, just trying to figure which gauge and waiting for next payday. (I just blew a huge wad of dough on a snare drum.)