T/C - But then again, I've owned only T/C. They will fix or replace anything, 99.9% of the time for no charge. I used to live down the road from their plant in NH. That was handy, and you had to be silly not to use T/C, just because it was so easy to get a quick fix. Saying that, I would also say that it was not often that things broke. They will talk to you about any problem over the phone and take the time to get you straight. I think their quality is better than CVA and the like. Can't say anything about Knight.