Has anybody used the Carlton premium by Tsumura? I haven't used all the bars mentioned here, but most of them. The GB bars must not be the same as the one's I used because they were the worst bar I've ever used. The one's I got were made by GB for Carlton. They had Carlton painted on them, so they must be making better one's now. I can't understand somebody saying Cannon rails wear down fast, they have the best tempered rail in the business. I know Oregon oven tempers there bars, but Cannon tempers each set of rails clear to the bottom of the bar groove. My chains wear out, not my rails. The Cannon and the Woodsman pro are the same bar. I know the Cannon rep and that's what he tells me. They are coming out with a new tip, same as the single rivet tip that they have now, but stronger and harder, so I'm told. I'm going to give the new GB a try, one of these times. The Tsumura looks like a good bar but haven't used it enough to give an honest opinion. They are the company that replaced GB making bars for Carlton. They are cheaper than Cannon.