I know it's early but I estimate about 2 more months before my Echo SRM-210 gets put away for the winter. Whats the best way to store it. It will be stored in a non-climate controlled shed. Should I completely emply it of it's gas or should I keep it filled? Should I add sta-bil or go without it? Any end of season maintainence I shoule preform before putting it away. It doesn't have many hours on it and gets used once a week. Thanks.