Avi K,
Missed much of the proceeeding thread
You usually could find,if you desire to, one abberrant shitah and trumpet it
Presumably,you are aware of those who hold it is Boneh and other issurim
Rav Shlomo Zalman Auerbach’s son R’Shmuel was asked how come he is so more right wing/stringent than his father was
His response:We heard what our father said in the kitchen when the doors were closed
‘the extra weight question is concerned see “The Shabbat Elevator” by
Rabbi Yisrael Rozen (on-line)’
Rabbi Rozen is useful perhaps when Bsha’as had’chak, hardly normative
He has been over the years has been sidelined by leading Poskim