Enchanter Tim wrote:Agreed, but I think it is reasonable to say at some point during the casting the item makes its way into your hand.
It solves the hand problem if you don't assume manipulating the material component and doing the somatic gesture has to be at exactly the same time. You caster can begin the casting, then reach into the pouch and pull out the spider silk/butter/whatever, and then complete the casting. All possible in a couple seconds.
Now that doesn't answer the 'Do you need to have the material component in your hand?'.
Yes, but I'm saying you don't need to be doing somatic gestures at that exact moment. So you wiggle your fingers, pull out the component, it gets sucked away by magical energies, and the spell is cast. Or you start the casting, pull out the component, it gets dissolved by magical energies, and you finish it by making a hand motion.