RichardV6, do you know how tight the cover is on the car? I use a medium one from Halfords and it's a bit big and have to gather it at the rear and bungee it tight around the luggage rack to take up some of the slack.
The one I have is made to measure for the car (it looks loose as it's designed for use with the hood up). It has three straps that go underneath - easy to skim under the car.
