"Imitation is the sincerest form of flattery....." Right?? The copies are a direct reverse-engineer of our original (3 year old) design which was not nearly as compatible with rotaries as our current design. Which, has ample copy-proofing protections built in. So, people purchasing Hurricanes and the 2 or 3 other Critical copies will not be happy if they are running rotaries. Or if they break. No support is the feedback we have received..