The board has a slot into it. This slot corresponds with the black adjustment piece for elevation, it has a piece that sticks out which is supposed to go into that slot, NOT rest on top of it. I suspect this is why yours isn’t holding much of a zero. My holy warrior rmr has a rubbish dot, it’s huge. Will have to take a look at the painted LED, thanks for sharing!

要跌幾次先用得😂

Stop buying these garbage cheap junk and buy Vector Optics instead.