Toi
I have never heard it presented that way. It doesnt sound that way from the MEchaber “???????? ???????? ????????” (not that its passul horizontal, but that it has to be vertical) .
Pischei Teshuva “?????? ???? ???? ??? ??? ????? ?????? ????? ????? ??? ??? ??? ??????? ???”
while your explantion makes a lot of sense, is it your own or have you seen it somewhere?