So this morning I opened the sky light I ordered online from HD.
Metal frame was bent in 2 places
Installation screws (10 of them) missing
Then related flashing kit does not seem to fit the opening for the frame
So figured out that there is supposed to be a little space that is equal distance all around between the curb and the skylight flange
So since the original skylight was damaged they ordered me a new one at a 10% discount.
So in the mean I should be able to build the curb and flashing arkound the opening.