A. Effler, G. Moreno, T. Sadecki

After yesterday's reapplication of First Contact on the ready-to-be-attached ETMy reaction chain, I peeled the new FC from the AR face of the ETM and cleaned up the edges with acetone.  Satisfied with the cleaner appearance, we began the delicate process of mounting the reaction chain next to the main chain on the upper structure.  With the assistance of the highly useful 5-axis table, and the keen eyes of Gerardo and Anamaria, the mating went smoothly.  Due to adverse weather, we decided that this is as far as the ETMy would progress today.  Currently it is attached to the US, but the wires between the Top Mass and the UIM still need to be attached in order to begin assessing alignment.  Also, the AOSEMs in the PenRe were removed to facilitate the mating by reducing interference with the flags, so these will need to be reinstalled and aligned before hanging the chain.  All in all, BSC6 is progressing, albeit slower than anticipated due to ongoing work on BSC8, travel of the installation team, and, now, weather.

Note: In spite of an attempt to locate the 'old-style' non-captive lower structure spacers, we wound up with one of the 'new-style' captive spacers with a non-captive, i.e. fully threaded, screw out of the 8 total spacers required.  We decided to see if it would work, and in so doing, decided to put in in the least intrusive place (the lowest, right hand position; it can be identified by looking at the backside of the screw opposite the head since we used a 2" spherical tip EQ stop screw) in case we desire to replace it in the future.  With a little help from a pair of needlenose pliers, we were satisfied that we were able to get it sufficiently tight.  Captive hardware for these is being ordered ASAP.