The asset account you use on your inventory items/assembly items: Do you have currency on the account? We had some consultants working for a small subsidiary a while ago, but they never finished the project, and they entered the base currency of the subsidiary on the stock account. As far as I know, you can make a currency revaluation on that account because of the currency. My instinct tells me to leave the currency field blank on the account, but I am not 100%. What do you say?

I don't think you can change that after the account has been saved, but in general I wouldn't because that restricts the currency of any transactions that go into that account. In other words, if they set the currency as USD, you wouldn't be able to use that item/account on a CAD transaction and you'd end up having to have separate accounts (and maybe items) per currency, which is hugely inefficient. If you have regulatory or other reporting reasons where you'd want to separate out currencies, then maybe that would make sense, but otherwise I wouldn't.