On my old 1982 Hunter 33 there was a a heavy ground wire attached to the compression Post to the keel bolts. The mast cradle was thru bolted to the the compression post. One of the features of the hunter line is that the keels are cast lead and not encapsulated so this might in fact work. Given the shortest distance theory I tend to agree with SD that providing a path may increase risk. Best bet is to be next to a 40' boat with a mast taller than yours.