And for what it's worth, when I saw this from Shannon earlier this year, it got me thinking - believe it or not, many of the products available out there are not TMA Certified. While any equipment can fail, it takes a good bit of time and effort to get a product TMA Certified. Food for thought - you might want to check their list before making your next purchase folks. And this is not a slam on anyone; I just never really thought about it until I saw this. Those sticks are NOT certified. Before looking into this, I'd have thought most everything commercially available was certified. Go figure.