Scott:
you might try going to stainless for your spinners. The chance of breaking one is vanishingly small.
There are a couple of manufacturers around that handle them. One is George Petrus at:
Accurate Machine Products
20417 Earl Street
Torrance, California 90503 U.S.A.
310-370-1035 fax line
email at:
petrusg@ix.netcom.com
Don't know if he's still in business but I got mine from him.
DonC