Fellow time-nuts, So, 5 years ago I was asked by Observatoir Royal de Belgique to take care of two failed 5071A cesiums and alter them so that there is one functioning. I did that, and have operated the functioning one here and there, but conservatively, since they wanted to do a mission with graviational red-shift. Since them, other things happen in life, such as Covid, prohibiting work. However, a few weeks ago I was contacted as they where about to go on the mission. I thought it would be nice to join, as I had quite a bit of the things needed for such mission. Setting it up meeds a number of challenges, as it needs to be powered continuously, and over a varity of sources. In addition I wanted to log as much data as possible. I've come far on that point. I log 5071A state and several other environment sensors into an InfluxDB and then illustrate with Grafana. Independently two GNSS receivers log things for post-processing. Just assembling the rig for the two 100 W PV panels and a choke-ring antenna has been a challenge. Let's just say that I should not be hired to do fine mechanics work. Things have been fixed during the travel, and I have driven 600+1100+800 km just to be in base-camp before final climb. I'm now sitting in a borrowed house just outside of Grenoble. I just had to tear out part of the equipment, as one of the power converters failed. Luckily that side was redundant for the mission, but I do miss one pressure sensor to compare the small one with. I had intended for my passive hydrogen maser to also do the trip, but it woke up with an unexpected problem and did not lock, and I decided it was not meaningful to bring it's dead weight along. I will have to investigate the actual fault. Also, I have been unable to log the internal state, which Would have given valuable clues. Tomorrow we do the final climb to Observatoir de St Veran at 2930 m and stay there for 8 days. Connectivity can be sketchy. In the end of the day, it is only if you try that you can either fail or succeed. So far, it has not yet failed completely catastrofically, but warnings-signs has gone of and they been managed, so far. This can still fail spectacular. Now I badly need my bed. Being sleep deprived does not help thinking. Cheers, Magnus