I try to report my experience: as soon as my RS was delivered to me I got on it and after about 15km I started hearing the famous perfectly rhythmic tock tock rock. At the suggestion of a friend, after returning home, I disassembled and pulled out some motor cable and the famous tock is gone! Clearly I was happy and blamed the problem on the cable. The fact is that the famous noise showed up three more times and finally disappeared. (for the moment ?!) My RS took no hits, no water, nothing ... That's are the fact... Meaby we are all talking about two or more different problems with one only true: poor quality! Poor quality control, poor material, poor building process, poor customer assistance.