Dr. Tray SpeedKnob Spring Assembly Instructions Thomas Rastall Updated July 01, 2017 14:12 Follow If you have additional questions you can contact us here, or by phone at 888-925-4621 M-F from 7 to 4 PT Related articles How can I tell if my Speedknob is locked or unlocked? The Remote Release Lever of my Dr. Tray is tight, can this be loosened? What is the capacity of the Dr Tray? How can I find Replacement Parts? What options do I have for a custom application? Comments 0 comments Please sign in to leave a comment.