That's why the next logical step would be the most challenging forum we can think of. If you and other TalkBoard members would prefer a one-step approach, running the initial trial in the most challenging forum, we can do that.
I think we might learn slightly more with the two-step approach. MSP, do you think the working draft should include a forum selection for the possible second step?
From a scientific point of view, if we don't need to commit on the second forum at this time, it could be better to let the results of the first trial inform the selection of the second forum. I'm assuming that it wouldn't matter to the IB developers.