I tried searching the posts, but couldn't find what I know I've read before...anyway...got a mercury carb tuner. I know how to hook it up and how to make adjustments. My problem is the parts to it. There are 4 small plastic cab looking pieces that I take are the line restrictors. There are also 4 brass fittings threaded on one end with a nut and O-ring. Can anyone tell me where these things go? Do we even use the brass fittings? Which way do the restictors go in...closed end towards the carbs or away from them? I don't want to guess it wrong and end up with mercury all in my engine. Wish the instruction page on the web site had pics...I'm kind of a visual learner. Thanks...