we rewired the mast on my CL Richards Offshore 38 (1980) a couple months ago. it started as a mystery: the wiring does not go up through the central cavity, which is blocked anyway just short of the steaming light. wires are run in a separate wood channel, and apparently are bundled. none could be pulled out. HOWEVER, we managed to run a snake up to steamer light outlet, spreader lights outlet, and up to mast head outlet, and left a messenger line each place after sending up new wires. steamer light was a sharp bend, this hard to be enlarged slightly. clam shell opening at spreaders/mast head both revealed tiny outlets through the wood staves. these had to drilled larger -- but this makes later access with the messenger easy. now if i choose to send a new wire up to the head it can be done with messenger while aloft. btw, the fore stave on the foot had 6 inches of rot -- but this was an easy and secure patch, quite as strong as original. rest of mast after stripping and sanding was perfectly sound without any indication of delamination. a fine spar that should last another 30 years...