After looking at the photo, I'll add that you should modify the forward pads to be easily adjustable. You want to bring the boat bow down as much as possible for the launch. Screw-type, i.e. jack stand, style is suitable.
If you leave the bow supported as it appears to be (that poppet all the way forward) then the boat won't slide off the trailer and instead will pivot with tremendous load will be on that one bow chock. Along with needing even more water depth to get the boat to float...
