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Yes, your description is correct. But I am more interested in performance change - improvement. I would say this new design would be better than the previous. This might insure more reliable sealing and maybe longer life of the cuff. It has been sold on eBay for the same price as the older type.It looks like they have added a bell mouth to the nozzle type seal, hence instead of an inwards protruding lip edge running on the spear shaft the movement is now through a section of short rubber sleeve that is necked down where the shaft slides through it. We will know more when we see one cut in cross-section along its longitudinal axis.
I don't see from the video that the trigger must be pressed to load the gun...I asked Pelengas dealers whether to pull the trigger when loading! They replied no, not necessary! This means that there is a third position of the sear, which is shown in the photo! The reliability of such a mechanism is low! Pelengas makes mistakes again! It is inconvenient and dangerous to load a gun with simultaneous pressing the trigger!
Pete, please look again at the video more carefully...In the video the camera shifts to look at the spring on the trigger end of the pull rod working. That spring pushes the pull rod backwards and holds the sear lever up after the shot. If the pressure inside the gun is increased it tries to push the pull rod forwards, but the spring has to be strong enough to resist this. In this Pelengas design that spring also has to work with the necklace type biasing coil spring on the sear lever. That means the gun’s operation depends on the correct strength of the respective springs being maintained. Once the pull rod slips over the tip of the sear lever the gun will not shoot, so then the trigger mechanism is locked.