Found this old thread informative but somewhat frustrating. I’m working on a friend’s 028 WB. It’s an old version. Tillie carb on it. Immediately noticed brake flag did nothing but move back and forth. It does have a return spring. Got into it and found no activation mechanism or band. Could this one be one of those early versions that never had a chain brake? There appear to be posts to mount an activation mechanism. Friend says he is not sure if it came with one and was removed. I’d like to retrofit one but I am concerned about getting the correct parts. Also, these can be tricky to install without a good diagram or an brake-equipped spare saw to use as guidance. Any Insight, advice, guidance would be much appreciated.