Yeah your right Harry,but the powers that be at CAMS have indicated there is a STRONG chance they will be mandated for ALL forms of the sport very very soon! The added cost will drive lots of folk away...ie. new helmet and device and who knows what time frame they will give us to comply.So as I stated,if in doulbt grab an RPM with post provisions if you have the cash,I think they are the cheapest at present.The argument is not mine but merely giving those the heads up on whats being kicked around at the various cams panels.Make of it what you will.