I've just been printing them one at a time. It takes 45 minutes to print a set, whether you print an array or one at a time, and this way is less prone to errors in my experience. I did set up an array of 10 on the bed last night when I went to bed because I wouldn't be here to watch it all night, but something went wrong in the middle of the night and I wound up cleaning a glob of plastic off my print head, replacing the nozzle and re-levelling my bed this morning before I could print again.. It's working to print them one at a time.
