I am new to Miatas so pardon the noob question. I am trying to figure out how to secure the soft top when it is down? The soft top is very easy to fold down but then once it's down I couldn't find any strap or anything to secure it so it wont' be flapping around. Do I need to buy a boot cover? I don't want to if I don't have to. I prefer to just somehow use a strap to secure it. Btw, it also has a roll bar, not sure if it matters or not?