If you haven't called and spoken to Todd Shusterman or Brian Jenks at daVinci regarding your shifting issue you should do so tomorrow. They are located in Colorado which is on Mountain Time.

US & Canada Toll Free (800) 873-3214
Local & International Phone (303) 936-1241

Other contact info can be found at the following URL, but it's really best to call and speak to your builder on the phone when a problem needs to be addressed:

http://www.davincitandems.com/dvinf.html