Well, I'm sure no one else is going to want to do this, but I think we should start at Volume 4 (ch.15-18), that's where the scans start getting bad. Leaving a huge gap of LQ seems pretty stupid. But that's up to the translator I suppose (the cleaning shouldn't be too bad, looking at the raws).
I also think Jam is right, we shouldn't hold ourselves to a hard and fast release schedule. We don't have any competition for this series and it's a monthly, so we'll probably catch up pretty soon unless we go really slow.