We noticed the other day that the HWS table beam apertures don't line up very well with the persiscope optics. After we got the viewport covers off today, I could see that the periscopes are lined up with the in-vacuum lenses. The actual problem is that the table is about 2" to the left of the design position because of an interference with the electronics rack. 

We decided the simplest solution is to just widen the apertures. So we've removed the panel and Bubba has it in the carpentry shop right now. We're going to widen the holes to match the inner diameter of the beam tube adapters.