I never had any of the playsets, so I just used the turret from the Maggot (which doubled as the turret for the Moray).  It was simple, yet effective.  For bases, I would just use tables, and bookcases for buildings (sliding books forward to make walls and rooms for characters/gear was so cool, my Pit was awesome!).  You know, improvised crap like that.  But hey, it worked! :thumbsup: