This artist is awesome. Too bad he doesn't do more mecha art.

PM model refers to this model mech on pixiv: http://www.pixiv.net/member_illust.php?mode=medium&illust_id=1089254

Could be puppet master, but there seems to be some other meaning for it since other mechs have the same partial serial.

I just love Chen's glove and the little lucky packet in the cockpit

This is f'n amazing. I would pay to watch/read this series.