After buying the rear uprights I have managed to get the rear to stay pegged down . I got up today to pools of water on the groundsheet. OK, one lot was my own fault where a lip of groundsheet was protruding outside the wall and of course thge wind changed direction overnight so the rain was blowing straight into it. Now another source of ingress seems to be the awning skirt rail. I thought it would be OK to leave my level at 0.5º from back to front (according to iPhone). However it seems that this has enabled water to slowly trickle along and into the awning area. I'm wondering if there is a product to prevent this... I'm thinking a blob of blu tack might be good enough. Ideally I'd have predected the change of wind direction and pegged down that side. I treat my awning as a kind of semi-outdoor space anyway, but it is annoying to end up with pools of water! Seems everything has to be exactly right or water gets in. Never had this trouble with tents.