I had this same Stucchi set for a while, but frankly you guys aren't missing anything. The guards cause a lot of extra and annoying vibration based on how they mount to the engine. They are good looking and all, but not worth it for the deterioration in smoothness and extra vibration.
I sold my set here years ago to another member, I don't know if he still has them or not. They are unobtainium, I suppose you could contact Stucchi directly and find out if they have any sitting on a shelf somewhere gathering dust!