* I like using Finn Crisp (and not just 'cause of the name!- because they come in small chocolate bar sized pieces already.
** If you are going to eat these right away, I wouldn't worry about this, but if you live somewhere humid (like I do) and want to avoid the dreaded 'bloom' of discolouration that comes from keeping melted-then-reset chocolate overnight, this is a great way to avoid it.