chaverim: You can read Rav Scheinberg the way you want to; I prefer to read him the way, Rav Moshe Feinstein would, the way Rav Shlomo Zalman Auerbach would, the way Rav Ovadia Yosef would, the way Rav Breuer would.
My Rav told me that he also davens in his seat because he feels it’s not possible for him to have the proper kavanah for davening while standing in a group: the plane is shaking and you’re trying to balance yourself and passengers and crew are trying to get past you, not to mention davening by the bathroom and the safety issues.