Is it better to allow the belt to slide a little, and save the engine? Or is it better to keep the belt so tight that the engine will cut out if the cutter wheel is in too deep? With the cost of the belts so high, I'd rather have the engine cut out on me, but I don't know if that's hard on the engine. Another thing is that I, myself, will not kill the engine much at all, but other fellas using it will.