I was referring to the ramp added to the tripping lever, so that it would disconnect from the sear, even if the disconnecting tip of the tripping lever were removed. If the maker has abandonned this modification, it would make conversion to full auto even easier.
The maker has added a cam to the safety selector so that if the selector is rotated, the tripping lever is cammed away from the sear; if the trigger is pressed when in this condition, the gun should not fire. The tripping lever will move foreward, but will not rotate the sear. This trigger safety is all very well, but it does not address the fundamental problem of open bolt guns - slam firing. The Mk. V cocking handle will prevent this, as will the original safety notch in the receiver. A more sophisticated sfety mechanism would lock the sear in place so that the bolt could not move at all either open or closed. Like a Sterling, for example.
Because the selector is able to move, conversion of the trigger mechanism back to selective fire is facilitated. The use of the full auto bolt makes this even easier.