Hi, guys I decided to have a Rhino Pioneer Platform, but the question is which mounting system should I choose? New Backbone or original 6 legs? I don't have RTT, so weight on the rack won't be too heavy, but I don't think weight is the problem for the mounting system. Convenience should be the problem, and how to clean the roof as well. Personally prefer 6 legs, how about you? Cheers!