Shims/washers will be the easiest and cheapest option, and I've never encountered a practical problem with this set up. Only you will be able to decide if it offends your sense of aesthetics.
Yeah I guess that's right, and at least I won't have outlaid much to give it a try! I'll have a word with LBS and see if they've got any washers that would do the job....
Still tempted by a carbon derailleur clamp but £££
Shims/washers will be the easiest and cheapest option, and I've never encountered a practical problem with this set up. Only you will be able to decide if it offends your sense of aesthetics.