If I may jump in here now
I'm also a Scala user but a Freecom 4, it's the first model in the range that will do rider-rider and unlike the Packtalk models, easy to work! It's 4 agricultural feeling buttons I generally have no problems with even in winter gloves.Set my unit volume to lowest with medium gain control so it'l self adjust depending on ambient noise, Garmin master volume takes care of nav media and phone
I'm also like LOM using custom in-ears, a benefit of the Scala is their standard 3.5mm audio jacks