Because of the toggle lock, the Old Model toggle cannot be lifted directly; it must be pulled to the rear until the latch is clear, when it then rotates upward due to the presence of the unlocking ramps of the frame. The hand motion is always rearward, and small knurled front edge of the dished toggle is ergonomically designed exactly to accommodate this motion.
The New Model toggle can be lifted directly upward, and the knurled faces are designed to allow maximum maximum contact and pressure to be applied to lifting the toggle open under all circumstances, regardless of any "official" methodology.
--Dwight
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