I have used the J'Tec mount with an OS 1.08 in a Dynaflight PT-19 and currently have one on an OS 1.20 FS in a Brian Taylor Typhoon. Those are the only mounts I have used with those engines so I don't have any direct comparison. It seems like they work. Vibration is not noticeable in the airframe. I can't comment on longevity of the rubber bushings. The PT-19 crashed due to a dead battery and the Typhoon is strictly a competition model that is not flown much. I bought a used mount off Ebay and the bushings were shot. I would use them again.