[atlas] adding probes to UDM

I have a few ongoing UDMs and there’s a few things that have occurred over the duration: 1) I requested 5 probes and only 3 were available (at the time). Is there a way to request the system consider more? 2) I requested 5 probes and 5 were available, but some have fallen out (and are now crossed out). I want to request 1 or 2 more to get back to the 5 threshold so I feel I have more accurate data. Are either of these possible, or do I need to stop these and create a new UDM with a larger number of probes to keep a more stable population over time? (They have been running for ~2 months so far). - jared