LOTS OF GOOD ADVICE IN PREVIOUS POSTS
I CAN'T ADD MUCH BUT I WOULD DECIDE WHICH ISLANDS AND WHICH WEAPONS I WAS INTERESTED IN. THEN FIND SOME GOOD OLD EXAMPLES WITH GOOD PROVENANCE (PERHAPS IN MUSEUMS OR BOOKS). USE THESE EXAMPLES TO ESTABLISH A COMPARATIVE BASE LINE AND THEN YOU CAN TRY AND GROUP WEAPON TYPES WITHOUT GOOD PROVENANCE. THERE WILL BE SOME VARIATION IN FORMS WITHIN EACH TYPE AND MANY DIFFERENT REGIONAL NAMES AND NO DOUBT A FEW MAVRICKS THAT DON'T FIT WELL ANYWHERE.
IT MIGHT BE POSSIBLE TO ASK ADVICE OF SOME OF THE PEOPLE WHO HAVE WRITTEN BOOKS AND DONE SIMULAR RESEARCH YOU MIGHT GAIN VALUABLE CONTACTS THERE. MR CATO AND MR ZONNEVELD COME TO MIND HERE. GOOD LUCK ON A INTERESTING PROJECT.