Hi, I was taking my Sino out of it's stock to clean it. When I removed the trigger group, the pad with a set screw and lock nut fell out. The repair looks like it will involve complete disassemble to re weld the the pad back on. It's beyond my abilities and I don't trust any local Smithies. Can you do this kind of repair work? I'll be sending you another trigger group for your mod. The trigger on this broke unit is nice. PM me with a price estimate if it's something you can do, and I'll add it to your form and send both to you. In your trigger lesson photo, I don't see that block with the set screw and locknut. Do some trigger groups not have it? Thanks, PAX