No, no, no. Do NOT change the diameter of one blade to balance a prop. I recommend NOT sanding, either, expecially with composites. Spray clear Poly-U on the front of the light blade to balance it. It shouldn't take much. If the prop slowly swings to the heavy side, then go ahead and balance it. It it bangs down on the table to the heavy side, take it back where you bought it and exchange it.

I repeat. NEVER sand composite props. Sanding creates stress lines which may cause prop failure. The edges may be scraped to soften the often sharp molding lines.

Dr.1