With the IR beam bath on the trans-mon ISC table (in vac) aligned, I had to move the IR telescope of the in-air ISCTEX by 3in in -x direction, and lower the top periscope mirror by maybe 4in. I moved the two-in lens on the periscope down to accommodate the top periscope mirror. Mirrors and lens were roughly aligned, but need a fine-tweak once we have a steady reference beam.