Is there any info on the 300 series?

So I don't believe we have someone slated to work on them full time coming up. But I did hear something this morning about how we wanted to do some cleanup on it coming up. So there won't be major rework or anything like that. But I know we have some bugs floating around that we want to try to prioritize in the next week or two. Maybe I can even do something about fixing bugs, if they're interesting.