FWIW, there is minimal tightening/movement of the lever required to secure the clamp bases to the table. As soon as the lever reaches the end of the springs' tension range, the bases are 100% secure and do not move. It is possible to move the lever further (with some effort required), but it is superfluous since the tightening has been completed via the spring action. When released, the lever springs back to the fully open position. The nut at the bottom secures the bases to the table. These are more robust looking than the bases shown on the SP site.
Last edited by Il Mostro; 07-18-2008 at 06:37 AM.