I don't like Zingers and this is an opinion made recently. Over half of the large Zingers I've puchased were not true. The blades were not in the same plane. I went to my LHS and found the same thing in their inventory. Just place it flat on the counter and measure the distance the prop tips are from the counter. About half were different. This caused a vibration and reduced RPM on my engines. Sad thing is, all of my local shops only carry Zingers in wood props.