An FYI... I spoke to Forestry Suppliers in January 2011 about repairing some Suunto and Brunton compasses and clinometers. The technician said FS can no longer repair Bruntons because that company will not ship parts.
He said Brunton's official policy is now "have it repaired under warranty within two years or buy a new one". He thinks the change in attitude was caused by a change in management. Bad news for anyone stuck with a broken Brunton compass or clinometer.