nope not really but do watch your fingers as the apc will bite a little harder than the wood prop will.I'm sur you'll get differen't replies on this subject but at this juncture the key is not running too big of a prop and overheating your engine.Break it in with the size they recommend then experiment with props wood/plastic , The key to breaking in a glow engine is running it 2 cycle and then letting it run at a 4 cycle as per instructions for a couple of tanks.The motor is going to change with each tank you put through it until it's ready, so use what your comfortable with.