Gday all just wondering if anyone on here uses these on their trailer. When retrieving i put the trailer in so the first keel roller on end of trailer is level with water so it doesnt float off trailer as im starting to winch which of course means when i winch her up all of the boat is out of the water and hard to winch up (have checked the rollers they all turn, even put thick grease on the two skids which helped a bit) When i put the boat in a bit deeper and the swells are up at two rocks marina boat keeps lifting off and out of alignment i want to be able to put the boat in deeper and just wondering if anybody uses these and finds they help with deeper launching to make winching quicker and easier  cheers Dave.