I had a bad one from B&M, but this was back about 1970. Through that experience, I was forced to learn to build my own. While I felt their build wasn't bad, I sure felt their 'warranty' in my wallet! Nonetheless, I learned that building T-flites was actually pretty easy and it gave me a few extra duckets now and then when I would run across somebody that needed one freshened or built for their race car. Making the tools took a bit of time but the actual building is a piece of cake! When I quit racing stock, I quit using 727s. Now it's Jerico DR4 and nothing else. If it ain't got the thiird pedal, I don't even look at it!