Here is project to replace the centerboard sheeve box.  The main job was to replace the centerboard mechanism. Everything in the bilge was rotted out, including the centerboard lift. I think many WI36 owners can profit from this information. We had a new pulley fabricated, all stainless. The material including bolts was ~$110 with the welding being ~$160. The old system was held by two rusty bolts. There was always salt water in the bilge because the stainless pipe holding the c/b pennant had pin hole leaks, this was replaced with reinforced hose.