Ok, so thinking about prefolds for wriggly bubs does sound like a nightmare - thanks maz!

Now am I strange in the fact that I don't use snappies with my prefolds? I just pop them on bubs and then put the cover over the top... Seems to work...

Also, What shape is best for inserts / boosters as extras for covers and AI2 outers where only the absorbant part has become wet/soiled? I'm tossing up between and hourglass shape or plain rectangle... anyone have any ideas?