Your doing it correctly with the float.
I use my power blade on my 300 for snow, and the only time I use float is when I am dragging the driveway in reverse. If I really want to dig deep, then I will add some downward pressure and drag in reverse as well. Some times on high spots in the driveway I go forward, but set the blade where I want it, and take small bites in several passes till I get it where i want it.
Snow removal for me, is I set my blade feet on the bottom all the way up on my blade. All of our driveways are sand, and only two neighbors have paved approaches to their garage, one is concrete, and one is asphalt. I dont set the blade on the ground all the way, I will "skim" it very close so i do not bull doze the sand too. I will remove snow going forward. The approaches I do, I set the blade on the pavement and push away. It does not scratch it or damage it, but it makes some noise. I have read, and to my understanding the adjuster feet on the bottom of the blade is to save and protect the cutting edge from extra wear and tear. Since I have owned my blade I have tried it with the feet down, but all it does is leave little tracks in the driveway where they touch. The sand is soft, so if they dig, then the blade will dig.
One other thing I do is in the fall when I am done mowing, and get my GT ready for snow, is I go around to my neighbors driveways and go ahead and drag, and level their driveways out with my blade. Getting the grass out of the driveway where the tires dont run in the middle, and filling in the low, uneven spots makes it a whole lot easier on me when I go back months later to move the snow. I do my own drive way, and 4 elderly neighbors around me. I don't do it for money or anything like that, I do it to help, and also I like the seat time. :fing32:
Our driveways are all sand, and so is the streets. Usually I will wait till the road grader comes around to jack the streets up, and I will "move" some of the soft loose stuff from the street in front of the drive way, back into the driveway. You know...just taking back the sand that washed out into the street from the summer rains.
:trink40:
~F~