so really Moores Squat Bar was an early invention Funk like the Squatters "Magic Circle" which became a trap bar..
here is pic of t-bar row unit.
holy shit, that looks exactly like the one i built in high school shop. best one i ever used.
not bad and all i ever made was a serving tray and a trash can in hs metal shop. shop class was sometimes a horror show for some. i actually enjoyed it. never thought to make a t-bar row however..
I made a shitty lat machine that worked ok, and a set of solid dumbells that I still have today. that t-bar row was the best one I ever used. but since it was the first one I ever used, I didn't realize how functionally well it was built until long after it was gone.