If we can manage to agree on this, you won't need to draw out the debate, but if we don't agree, at the start of the next meeting you'll have the support you need to limit the number of hours. You don't need to do this today. In fact, if we can agree, the debate won't be drawn out at all. If we can't agree on this, and you have a majority, at the beginning of the next meeting you'll be able to set a meeting adjournment time. I can't see where the problem is.
All I need is to get the sense that we're all going to cooperate. I'm not trying to hide anything here, I have no intention of having the next meeting last longer. This is a motion which specifically sets out what you proposed. But I need to see it in writing and I need to have an opportunity to talk about it with my colleagues. As for everything else, if we can agree on the motion, there won't be a debate, and the issue will be settled.