Having seen a vast improvement in the Arducopter handling when vibration was reduced I decided to experiment further. I thought it was worth trying to soft mount the tubes so cobbled together a test frame on a bit of 4x2. The 12mm tube mounts are held in place with ‘o’ rings. The video is with standard 75 shore rings 17mm ID. This was just the first test so was quite pleased but will experiment with other types/sizes.
This method will probably only work on a ‘H’ frame where the motor lift balances out.