I received my Titan Pro to Dual Hybrid kit today. I went to put it together and couldn't find the fasteners that the guide was asking for. Being smart I pulled out all the extra hardware that came with my BigBox and sure enough there were some M4 square nuts. Good there. Then I got to the 4xM4 Grub screws for the hot ends. I only have two. I took apart my existing carriage in hope that those parts would be on my existing x-carriage. Nope. They used regular M4 screws and not grub screws. It is amazing that this kit comes with everything except for fasteners. I guess I need to go through the entire instructions and see what I am missing. Very disappointed.