As a novice, bought my first aud alti, the pro track, for my open face helmet a few months back. Deciding to do more rel work and buy a full face helmet thought it would be a bit painful to change to housing round from the two helmets every so often. Emailed Larsen and Brusgaard with this and also asked where to get more elastic bands for the protrack. Within a day they indicated they would send me another housing component for the protrack and some elastic bands - FREE. Received within a couple of weeks multiple housings, numerous rubber bands and spare batteries! These guys are absolutely awsome! Thanks Larsen and Brusgaard!!!!