"Should i wait for the TGO challenge to be over before ordering?"
Tarptent is shipping out tents as I write this, whilst Henry is having fun.
Fiddling with the tent before real use is a great idea. Take your time doing that, each tent has it's own peculiarities so get to know them.
Here is my video clip on setting up the Scarp
http://www.youtube.com/watch?v=XWE0gx7rSXU&feature=channel

Franco