Mini is serial 30. Magnetic switch I believe. I push it almost all the way in, and it makes great contact. The zenesis standard I just got off the classifieds has a much different feel to it. Spring switch if im not mistaken... I only have room to push it in a 1/4 of the way, max. It makes a solid connection, but I don't like the feel as much. Is it possible to adjust this? I tried turning the screw on the inside to lower the contact, but it was not budging. Any suggestions?