About handliing, I cannot believe it would be important to hve the pivot going to the shoulders. It is just how this setup happens to be on his bike. If the pivot moves to much to the middle the self centering force will prevent the bike from turning at all. If I'd make one I'd put the pivot as near as possible to the rear wheel, and try out different pivot angles (the angle on his bike is 71degrees). I just found another project which turns the pivot angle around (opposite of self centering): http://abiker.smugmug.com/Senior-Project-1 There are also some videos. They clearly have more problems there (collapsing bike effect also the self centering is gone). Dirk ============================================================ This is the Python Mailinglist //www.freelists.org/list/python Listmaster: Jürgen Mages jmages@xxxxxx To unsubscribe send an empty mail to python-request@xxxxxxxxxxxxx with 'unsubscribe' in the subject field. ============================================================