You may not see the value in the model building exercise...but I can confirm that occasionally some FSP staff volunteer to relieve the crowded shelf of a few well constructed examples if that makes any difference
There is both pre-prepared and impromptu speaking, and you are quizzed by the board on aspects of these. Its not hard to guess what they might ask, thats what I did and it was pretty close. Best advice is to know all of the services, know yourself, know why you're there and also get a bit of speaking practice in. Some say its defeating the purpose, but I say the best impromptu speeches are the ones you prepared for