I just bought three Trimmer Trap Racks, one for the weedeaters and two for the blowers. The ST-1, the track for the 340, works fine with the pin to hold it in place. However, the BR550 rack doesn't have a pin-type system to secure it on. I about lost the blower hitting a bump today, about giving me a heart attack. What do you guys use to hold the blower in place for this rack? Pictures would be great too. Thanks for your help.