f2racer - I don't recall seeing a D.L. 120 , The one I have and was flying was a 66" rated for .60 -120 or small Gas. I can testify first hand it Will fly on a Zenoah G23 and fly very well, I also flew it with an O.S. FP 60, A saito 72 , A O.S 70 4s, Saito 91 4s, O.S. 91 4s, and Magnum 120 4 stroke. The only ones I remember are the .40 and .60-120 size, Dosen't mean the 120 didn't exist , Just never heard anyone else mention it. I did a few searches and could not come up with any info .