Yes, there were at least 2 different length tubes. I do not know the dimensions off hand but can get them for you if you need them. Nearest I can tell, based on Judging Standards, the early 1930 vehicles had the shorter tube. There also seems to be suggestion that perhaps some Victorias, Deluxe 2 door Phaetons, and maybe A400s had a short tube to go along with their longer upper steering column bracket. As the earliest 2 tooth columns were installed starting in Feb 1929 and they had a worm shaft that was 43" long as opposed to 44", it stands to reason they may have used this shaft through early 1930 along with the shorter tube.