I have a 48" w/b floater.Adjusting the height. On one side of my deck I can get the pins all the way to the last hole. (9th hole from the top) and on the other I can only raise it to the 8th hole. The pulley or something stops it from going to the 9th hole? I have a couple of accounts that require 4.5" wich is the 9th hole. Any suggestions?