So why the different techniques? SRAM has me tapping and purging bubbles at both ends with the syringes. Shimano I can do a gravity bleed and just pour fluid in the cup at the top and let it run out the bottom. I'm not trying to start a debate about which brakes are better. I'm just trying to understand why the difference in bleed techniques. Is there some significant difference in the way the levers+calipers are designed, is it due to differences in DOT vs mineral oil, or is it simply a difference in the youtube videos I happen to watch.