I have both the 20s and 10c Sena versions and greatly prefer the method of attachment of the boom mic and module connection to the helmet mount on the 20S eg. Boom Directly attached to the helmet mount More stable No additional cables inside helmet No delicate cable or connection to break Module connection directly to base mount No tiny delicate cable or connection to break It would be great if Sena could utilities the strong points of the 20S helmet base mount which itergrates boom and unit connection system, for the 10C, so you could interchange the 20S and 10C unit on the same helmet mount . Whilst I understand the need for adjustment of the camera angle, Sena should be able to come up with a system that allows for this.