My external staircase arrives soon . It’s in sections ( apparently! ) . Heaviest single component is 95kg . It will have a lip and rest on the wall to the left ; then lowered down . Though I have a winch there’s no where to fix it to . I could make a Scaff tower and get an end on there whilst the other rest on the wall . But how do I lower ? What’s the best ( and safest ) way to do this apart from crane hire ?