5610. Its certainly worth a shot! I must confess, one of the things I like about Tinkers over something like Silent's gems is how potentially all sorts of things could be used. Like the liquid chorus from Integrated Tunnels - I'd like to see that as a material, if it isn't already. And I wonder if some synergy bonuses could be interesting - like if you have an End Rod and a Chorus head plate, perhaps you get bonus Enderference or something; or bonus damage to End-related beasties (like Smite is for undead). Or if you have an Enchanted Wood rod and and Enchanted Metal head, there's something there like a small amount of bonus XP. I dunno, I'm just spitballing