OK, using vise grips on the silver metal barrel spacer, I finally got the ADJUSTER HEX cover to come loose so that when I turn it to the right(clockwise), the number of screw threads are visibly increasing. So far, I have added over 1" of visible threads turning the ADJUSTER HEX cover. However, the trike still moves back and forth in a 3 to 4 foot span distance with the Parking Brake's pedal set on the 4th click. How much more screw threads distance do you think I am going to have to make visible before I see the Parking Brake pedal holding the Trike on the 4th click or do you think I have already gone to far indicating I need to replace the rear brake pads? On your Trike, how much screw thread distance do you have between the silver metal barrel spacer and the ADJUSTER HEX cover with the JAMNUT screw threads included? Thank you, Allen S.