Finally got the pictures uploaded to Photobucket....here they are.
Overall location to start finding the hi-speed adjustment screw in the purple circle;
Extracting the nylon plug;
Well here is the elusive nylon block-off plug that hides the high-speed adjustment screw;
There are some nylon chips inside the hole but there is a slotted adjustment screw in there. I gently seated it and then backed it out 1.5 turns.