My campaign is run from mostly DnD 1E converted modules, so I've created a system that would account for the majority of the items found within those modules, but with a BRP twist and plenty of room for customization. Note that I use Magic World Sorcery rules alongside Classic Fantasy rules in my fantasy campaign that has a slight steampunk-ish twist.
This file replaces the Ritual (Enchantment) skill used in my own Rel'Pek campaign, which is an INT - based skill (bonus of half INT) and is one of those skills that has no base score.
As is usual, your feedback is welcome,
John P Meyers