Have you done any testing with yours? Have you found that you've
'learnt' from it?
This was part of a contract design that I did for MIT. They did a one week
trial in Venice last month. Too short a duration to "learn" direction.
I believe it takes a few months.
I believe the pager motors they used were ---
http://pagermotors.com/index_files/Products/DiskL/DiskL.htm
These motors would also work ---
http://www.precisionmicrodrives.com/product_info.php?products_id=92
(* jcl *)