I've got two questions that I've not found answers to so far, so I thought I'd ask. I'm new at m-bikes so please excuse me if they've already been answered: 1. Since vibration is a problem for most (all) m-bikes, why aren't vibration absorbing shock mounts used? Even something as simple as a thin sheet of high density rubber between the motor mount and the frame should reduce some of the vibration, but I haven't seen anyone do this. How come? 2. Has anyone added a rear seat on their bike? Something like a child carrier, except intended for a (smaller sized) adult? I see them in photos of vintage bikes but haven't seen them in more modern versions. Is it because modern bikes can't carry the additional load? Or a safety issue? Thanks!