For a while the BS chamber's HEPI has been an outlier because I accidentally loaded theposition filters to the level 2 slot, where all the other chambers use the level 1 slot. I used foton to copy everything over this afternoon so now the controllers occupy both slots. This means that now the BS-HEPI can be isolated just like the other chambers by pushing the isolate level 1 button on the Commands2 screen. The level 2 button also still works, I didn't change anything there.