Ultimately I would like to have them machined. I'm wondering how strong they would be if printed in the steel material. Also need to find out if the material can be tapped for threads. The wheel design is part of a 3 piece system that bolts together.
As far as the sounds, I'm not sure on how...
That's really cool to have the arm actually working!
On a different note ( pun intended ), are you using the sounds from the Yahoo Group?
Were you able to clean them up any? There seems to be some background noise in them.
Here's something I've been working on.