It sounds like the OP's plane is just a bit more slippery than he'd like it to be. Before trying all these tweaks, why not try taking a little bit longer landing approach to see what happens? Get the plane down to 3-4 feet off the ground around 50 feet from the end of the runway. When you find yourself having to blip the throttle to be able to land in front of yourself you'll have found the right distance for the wind conditions for that day. If you are diving at the end of the runway from your normal flying altitude, you'll find that there are very few planes that will slow down enough to land properly without making you walk a ways to get them.