A bunch of linked questions...

If an Artificer creates a wand of a wizard/sorceror spell (such as fireball), do they need to UMD it all the while?

If an eternal wand is placed in a Warforged Wand Sheath (which states a wand can only be removed when it has no charges), is it stuck there?

If the answer to Q182 is 'yes', is there a cheaper way to get a 'silenced' spell 2/day?