I am putting active effort in into making this happen, because I would like to be able to swap roles. At this time, the hurdle is non-conforming frame sizes, which means new tandem, which means a lot of money (escape route: rent a suitable tandem for a day, hopefully happening this summer). Isn't it a wonderful idea and exercise to keep swapping the role of who needs to fully trust the other person? [I'm sure this would be a wonderful thread topic on its own :-) ]