I just compared the 3 element SteppIR to the Tennadyne T6 and other than the fact that the SteppIR costs over $1000 and the T6 is about $500 I cannot find a significant difference. I do not operate 6 meters so that is not of any value to me. Why would I spend twice as much and introduce moving parts and the risk of a mechanical failure? Help me understand. Thanks, Bruce k1MY