You are likely to find that the bars at full lock either direction will hit most if not all non OEM tank bags. I have two Cortech's a small 5L and a larger 10L one and both are mounted with my own arrangement just opposite of the position they should be mounted to allow the handle bars to go full lock with no restriction. That said, the larger bag does turn on my heated grips when the bars are turned fully left, but that only occurs when parking it or pushing it around and it's noticeable when it happens (warm hands!) so no big deal. The Joe Rocket Manta's that I have seen seemed a touch narrower than some, so might be an option. Still would have to be somehow mounted specifically for the Trophy though.