So I was looking at the contour of different razors after the blade was secured in the razor and I found that the cheap DE TTOs have a slight concave curve to them when looking at the blade from end to end (sighting down the length of the blade bar). This includes the Feather Popular, Misaki, and Weishi 2008-T razors. Curiously, none of my Gillettes seem to have this concave contour to them. Their blades are flush and straight in line with the bar. Could this be the reason I have been nicking myself and not getting a very smooth shaves out of the cheapies? Anyone with knowledge on this please chime in. Thanks for any advice on this.