last week we found out that the concrete in the ESM shed was unlevel making the roof of the shed unlevel so we removed all the sp80 screws from the truss on the roof where it was unlevel then we used aq bottle jack with a 4 x 2 on top the bottle jack was used to lift the truss up making it level once we got it level we bolted the SP80 back in to the truss making sure it don´t move and stays level after we put the SP80 all in we could start putting the ply-wood up now knowing the roof level so the ply don´t dive down as we put it up.