The other difference I noticed with the tbar crossmember is the alignment hole placement on the bottom of the part. The jig I built cradles the part but also has pegs to align things using those 1" dia holes. The hole placement was a bit off, so you can't use those to help realign things, and if you're doing any diagonal measurements on the car down the road, the measurements are gonna be weird... Otherwise though, the tbar crossmember dropped right in and measured right on where it mattered.