Have you tried getting in with roof on, doors on and crash helmet on too. No, well I have, but I won't be trying it again. Luckily I was still on the drive and nobody was around to see. I usually just have the roof on if its raining and leave the doors in the garage. I.ve been up and down the m1 like this with no indication of the top trying to blow away. I do leave 2 of the fasteners at the back near the spare wheel undone, this lets the air/pressure release from inside.