I have or have had flippy caps on my KM130, BR600, MS361, MS440 and MS460. They work very well, except for the one on the BR600. Last Saturday, I prepared to blow leaves and filled up the BR600. It's always tough to get the flippy cap back on, and when I tried, I heard a dreadful "POP" and saw a little orange disc flying through the air. I threw the blower in the SUV before that orange disc landed. Three minutes later I was at the ACE Hardware/Stihl dealer near my home. He had a new cap installed before I finished selecting plumbing items I needed for another project. Cost? $6.75 It works fine now.
How did I vote? I like Belgian beer better than Belgian polls.
ole joat