My name is Bryce Gibson and I am currently a junior at Wentworth Institute of Technology. I am researching everything and anything that has to do with bicycles and tricycles for a project. As of right now we are designing a tandem tricycle for urban use only. I am looking for any information or thoughts that you may have. More specifically, if anyone knows if a shaft drive system can be implemented on a tandem bike please reply. Thanks a lot.