To all LB owners, please check the part of your alt brake that is mounted on the side board. Mine has split in half after 9 months of use, from what I can tell the alt bearing has scoured it over time to the point that it's eaten all the way through.
It appears that it's a combination of material that is too thin and poorly thought out.
Here are some images, please check yours and let me know of the results.
Thanks, John.