Bram and Craig,

Some time in the last 24h we hung the TMSY Telescope (+ ISC breadboard). We used an optical level to level the breaboard to ~0.5mrad (0.25 mm / 500 mm), in both pitch and roll. This was quit easy achieved by moving the balance masses underneath the breadboard.

Prior the hang, we measured the mass of the breadboard/Tele to 80.54 kg. A few (6x) small beam dumps are missing (and not being installed). Also, this doesn't include the partial mass of the cables coming down from above.

We installed the safety structure, which is bearly functional, but we have a few trick up our sleaves to solve this. Then we re-adjusted the BOSEMs (lateral and along the flag) to maximize range. Also the BOSEM input filters were update to set the correct offset (open_voltage/2).

open voltage F1 = 22 700 cnt

open voltage F2 = 24 100 cnt

open voltage F3 = 28 500 cnt

open voltage LF = 31 800 cnt

open voltage RT = 20 030 cnt

open voltage SD = 30 400 cnt

Simple damping loops are engaged and working. More detailed loops will be implemented in due time.

Attached are a few photos (more at https://ligoimages.mit.edu/?c=704)