aerostock delta magnetic effector

ball links are replaced by countersunk ring magnets (15mm x 3mm) + steel balls (12mm).
The balls are drilled to 4mm and a 4mm carbon rod is inserted and CA glued in the hole.
It can be viewed in action on youtube "aeropic" channel
http://www.youtube.com/user/aeropic
item number : UUA9ii2vFh3SarF4TDDmS7IA
http://www.youtube.com/watch?v=8bEPf3gQgoA&list=UUA9ii2vFh3SarF4TDDmS7IA&index=1
A thread is also active: "aerostock delta"
https://groups.google.com/forum/#!topic/deltabot/Ae_R939fzN0

Nothing would be here without the clever ideas of Berrybot3D : http://forums.reprap.org/read.php?1,195809

edit : 12mm give far better results for the same magnet the measured static strength is:
- 12mm more than 750g
- 10 mm no more than 500g

edit: added epoxy+steel seats for the balls
see it in action here: http://youtu.be/R3WuQjNps9E
explanations here: http://www.thingiverse.com/thing:95258