I have a set of monster sized Givi soft-sides that I picked up for the 919. Unfortunately the MIVV X-cones do not have a heat shield and as such do not play nice. If I can find the reciept I can tell you the model they are. They are large bags (I can almost fit my 5 gallon gas can in one side.) They were on a bike for all of 3 miles to get them home, other than that they are collecting dust and bugs. All manuals and straps will be included if you are interested.
if you love your motorcycle, set it free.. if it comes back and hits you.. you highsided
Do those bag straps put a lot of stress on the plastic seat cowl that you have noticed? I've been considering some soft bags in case I ever go on a long trip and want to avoid backpacking stuff (on hot days).