Is there anywhere in the core books or errata that address the change from 3/3.5 to 4 in spell casting or maintaining a focus to cast? Also is there any addressing at will melee attacks as magic or focus based to initiate the action? Trying to figure out a way to allow a broken race (Dvati) to be played with 4E mechanics. Unfortunately there is no information given on melee attacks. Any info or opinion would be greatly appreciated.