The C.O.M.B.O. Well is the main part of the C.O.M.B.O. Button.Paired with the Ring, it holds everything together in a C.O.M.B.O. Button.
The C.O.M.B.O. Well is designed to shorten the total travel of the button. Typically, it is the bottoming out of the microswitch that determines the total travel of the button. But the Well is designed