I don’t want to push it too hard in the first one. I need to gain the experience of completing the distance before I go for speed. So I won’t be trying to get anywhere near that. But if you and the calculator are saying it is in some way realistic that gives me belief that I can achieve the sub-3:30. Thanks for the link
Good plan.....start on a 3.30 pace (given your half time you’ll find that very easy) and stick to it.....if you’re feeling good with 5-6 miles to go you can up it then.....