The existing trigger geometry & pin spacing on the stock trigger does not allow much room for improvement. This is where the shooting sight trigger shines because it's manufactured with favorable geometry & spacing. If you want a better trigger on the Tavor other than removing the reset spring buying one is the only real option.
Springfield does great HK triggers but his AR triggers are kind of a hack and I know nothing of his Tavor work except he is limited to what's possible without re-making or locating components.