Does anyone use a harness on a stair lift? I have been advised to have a through lift installed which will create up heaval (moving radiators, widening doors, moving family bedrooms etc). Having looked on the Internet a easier solution would be a ceiling hoist at bottom and top of stairs with a full harness on chair. However my O/t is concerned if my trunk muscles deteriorate this wouldn't be safe. I wondered if anyone else has had any experiences with the harnesses.