How to repair interelock switch for my Cuisinart dlc 7 super pro?

I need to repair or adjust the interlock switch for my Cuisinart dlc 7 super pro. The unit works well but the nylon pin that pushes down on the interlock switch does not always go down far enough. I sometimes need to press the back of the bowl down (or pull the front of the bown UP) to get the motor to engage. If I take the bowl/blade off, I need to press the interlock button 1/4" or more into the base to get the motor to run. It is NOT the bowl/plastic interlock mechanism, since I have 2 bowls - including a brand new one - and the problem is the same with both. I am mechanically inclined. Help, please.
Stan

Stanley M. Byer
January 2008