Plus I don't think there's anything wrong with a warlock being able to build a Belt Of Strength that makes you stronger and not being able to waggle his hands and make you stronger. There's all kinds of mythology and whatnot about magical items and it isn't some precondition that they were all made by people who could do the same thing by waving their magic wands whenever they felt like it. Sure, usually something that made you strong was made by someone strong, like a giant, but doesn't change the fact that 'dark insane guy who makes magic stuff' is closer to myth/legend/story than 'wizard who knows the spell can make the stuff that does the spell'. Plus the rules specifically state that warlocks don't need to know the spell to create the objects, so, specific > general and all that. Even if the spell Cat's Grace never ever existed, that doesn't mean warlocks can't make Gloves of Dexterity. Hell, even if they don't even know the spell /could/ exist, it doesn't matter. They can still make the damn gloves cause the gloves don't cast spells, they give a constant enhancement bonus, and cause their class says they can make the gloves without even having to /worry/ about spells or whatever.