Yeah I understand the bottom screw is the best for performance. I ride the salt marshes and creeks, mud, weed , and more mud. The only reason I use the top screw is so I can clean out the clogs on the side of a creek. I have a modified thumb screw for the adjuster and carry a wire poker as standard equipment. And I know, stay out of the 3 inch deep creeks and it won’t clog, but where’s the fun in that?The lowest hole ends up becoming a drain when you turn the engine off. I like to get the water out because our metal parts do last longer without it there. Injecting water closer to the engine is just a somewhat easy way to mask poor pump tuning. B pipes do not have the highest RPM length to begin with. If you cant run them at their highest output setting then the engine is simply overloaded. Opening the top screw is like running a $1000 pipe at the $300 level.