The constraints are springs and they are set fairly stiff. However, if there is enough weight/force on them they'll compress and then flip around causing your carefully constructed 'spire' to collapse.
you currently can pack them very dense though -- it's was pretty easy to get up to 2300 in no time flat just by putting a ton of dots close together in a big 's'-shape, repeating layer after layer.
Although once it does start swingingat that point there's not much you can do about it anymore...
Anyway, looks interesting.
Good luck with the job hunt. :-?