I made both a Leadstone Enegry Cell and a Hardened Flux Capacitor, and you are supposed to be able to put them on Tinkers Tools as a modifier, but they just won't go on. whenever I put the tool and one of the Rf items in the Tool Station, nothing happens. The "Materials and You 2" book says those are the items that give the upgrade and yet nothing. My pick is Manyullyn with 2 of 3 modifiers on it already: redstone and lapis. It says it has 1 modifier slot available still. It is also at full durability.