At the ICC 2011 Bill showed a new stretching device to do assisted stretching of the back. It’s advantages are that you can easily relax into the stretch and that the assistant has a good grip and does not need too much strength.
Of course first thing we did at the Hamburg meeting is to build one. Instead of the wooden version we used water pipes. It shows good stability and works well.
Here is a time lapse video of the build up.
And some close ups and pictures of the usage