What kind of aftermarket systems do you have installed on your M4RS 280 EDC Sport, if any? Does it drone? I own 2 systems: GT Performance full tube K-Tec Racing full tube And both are quite droney on motorways regardless of mode selected in R-Link. I have tried to install middle silencer only, but then the system is rather quiet. Is there any system that you can recommend? Perhaps post a video? My requirements are: Good and loud sound in Race mode. No to very little drone on motorways. I am open to any suggestion. Thank you.