Where are you Seaking? On the west coast of Canada (we still use Sea King helicopters, is that where your handle comes from?) Rufus Stewart is the man for this kind of set-up and regulation work. My Martin O-18 always had intonation problems until he got hold of it--he actually rerouted the slot groove in the bridge (invisibly!) and shaved each portion of the saddle for perfect results.   

Rufus Island Guitar Shop is in Victoria BC. I would take my guitar several hundred miles to have him work on it (alas, several thousand is not practical). www.rufusguitars.com He even posts a detailed schedule of rates for different operations on the site. Not cheap but an excellent investment.

W-O