New vignetting in hi-med at echelon 10,echelle 17

After recentering the slit, decker and filter in camera mode (at low res), I noticed that we are now vignetting when in high-med. This was not the case at 23T/4T, and I'll prove it with another set of images when Bob is done with his tests today.

For now,
Here is the SDF, medium res mode: (Vechelle=3.5480V, 4.7um filter)

And here is the SDF, high-med mode (Vechelle=3.5244V, 4.7um filter)

 Since the Q0 line has not changed position I don't believe we have changed steering. And I verified that both flip stops are being reached. Maybe this is due to a clip at the roof mirror between the two chambers? I recall hitting them high during alignment, and now that the focus is deeper in the echelon chamber, the beam could be too big for that spot on the roof mirror (?)