I heard of two last year - one in New England (no major injury except to the boat) and another in Key Largo ... I think the Key Largo incident was a construction worker who was moving a boat around at a resort and ended up loosing a hand. Or was that one more than a year ago? Mary?

It does happen and bitch and complain as we might about the comptip...there's no way to tell how many electrocutions have been avoided since nobody records 'near misses'.

With regard to modifying your existing mast, I would locate a similar profile from another boat (older/smaller Nacras come to mind) and modify the base casting and boom mount to work with the existing setup. Adhering carbon to the plastic comptip would have an unpredictable outcome. You could sleeve another piece of mast in place of the comptip but you will end up with a stiffer area at the point of the sleeve which might be worse with regard to performance.