I'm quite interested with what you've all discovered here, and hoping it will make item gathering easier for Tulkas. Equendil, would it be possible to get the lua files you are using to extract this data? I honestly have no idea how you coded it all lol. If you are able to examine LIs to get legacy info I'm wondering if other equippable items will also contain info for the stats etc. If so then that could eliminate the need to manually enter the stat information.
But if not, I'd happily settle for the generic item ID.
Thanks all of you for the hard work in slowly unravelling this mystery :) Awesome job!