J. Kissel, J. Warner, G. Grabeel Given that there is no obvious cause for the locking mechanism failure on the recently rescued GS13 s/n 574, I've elected to replace the stock delta rods (some of which had already buckled) with the much-more-robust aLIGO flexures (D0901318 and D0901319). The fragile delta rods are the primary reason the instrument needs a locking mechanism, so with the next flexures and the already-present, high-resistance pre-amp (D050358, s/n "Larry") the instrument should now be portable again with much less fear of irreparable damage. Thanks to Jim for grabbing me flexures, and thanks to Greg (already an expert in the modification procedure) for actually performing the replacement. Pictures attached. For now, the instrument remains in my office. New tally: S/N Config Current Location 568 V EX, in change-room, by bench 574 V CS, In my office 578 ?? EY, on change-room racks 584 ?? EY, on change-room racks