Update 2023-02-10
The blue CD is degrading its operational performance: now it cannot be re-positioned from UMAC at all. It can no longer move down to CD1. It only can traverse between CD2 and CD3 through manual operations. The blue cross disperser has been moved to CD2 and will be left in this configuration. Further work in the future may be done if CD3 is required. The bottom line: CD1 is not available.
The two new Linear Stages from Feinmess/Steinmeyer Mechatronik Dresden are promised to be delivered in May/June. They have to be tested first at AIP and delivered to LBT in August.

Original Post 2022-09-19
The position of the PEPSI Blue Cross Disperser is unreliable and it is recommended to take calibrations before changing configurations.  This can mean significant downtime, ~ 25 min per blue configuration change if needed.  We recommend setting up such that a single blue configuration per night is used.  This allows the Blue CD selection to be set and verified during the day.  Any questions, please contact sciops@lbto.org.