Just set up a fairly basic 5 litre American-style wheat beer last night. Given that it's my second time using the recipe, I want to mix it up a little by trying something new by adding some citrus notes to it. I've read that other brewers have had success with "dry hopping" their wheat beers by adding Valencia orange peel and crushed coriander (soaked in a little vodka) to the secondary for a few days. However, I'm a little in the dark as to: A) how much orange peel and coriander to add, and B) roughly how long to leave them in the fermenter to get the right flavour levels. Any recommendations?