I'm going to pass on the "should" question. My instinct tells me it could be ambiguous, because "should" has several uses. If you use "should" in the sense of "ought to," then it would be redundant. You'd be saying it's necessary that they ought to do it. And, in fact, you'd no longer be saying that they should do it. You'd be making a major change in the meaning. I hope I'm ma