the split plastic collar antenna base is hopeless - breaks off internally all the time - replaced mine 5 times now in a bit over 2 years on my RDS and have other fliers at my club that have had similar experience with it. A really bad design - can't believe they wouldn't have corrected this on the higher $ 10g - but it is enough to stop me from upgrading. Wonder why there is no '0 star' rating (Posted on 6/21/11)