I know SRAM and Sachs is together. So anyone know the comparison between Sturmey Archer and Sram in 3 speed on a Brompton? I had 3 speed Sturmey Archer on my Dahon "game over" before. Does it mean the Sturmey Archer is made in China so quality is not so good? I am thinking buying an used Brompton. Do I need to be aware about the brand on the internal gear hub? I know they put different hubs on different year. Thanks!