Hi Tony The first thing I do is remove price and warning tags. Yes I have seen some flyers leave these on. I carry 80 grit sandpaper in my flight box . I lightly sand just the edges of both blades down too hub to get rid of excess flashing and sharp edges. I use the finger tip balancer ($5) out of the wind and check balance. The heavy blade I sand only the tip edge and not worry about hub , because it is so close to center of rotation. Some guys will tell you to put heavy blade oppisite of top dead center and not balance. Oh make sure you ream out hole before you balance. I only do this at field when needed because I own different makes of engines and prereamed props only to find out the engine needed metric instead of sae size. I want to keep this simple and not make a ritual out of this. On wood I only sand heavy tip and no sides.