Hi Andy, glad you have ordered the full set, you wont regret it, as you may have guessed I have the 390 and it has stood up in gale force winds mind you I do use the longer
rock pegs in all types of ground.
One more tip, they can suffer from condensation inside so we tend to leave the top off the doors open to give a bit off air flow through the awning, use the net/fly screen to keep out any unwanted visitors it seems to help.
Also when you roll the blinds up roll them away/under themselves and not towards you as this can pool water from the condensation.
This tip was given to me on recent PC Woosie club meet by Woodlands Camper
Mind you if the sun shines this year you wont get any condensation