I can happily use two 3DR radios on reach RTK’s powered through the USB port using USB OTG cables. This is how I operated before buying some RS’s.
Now I can intermittently power the 3DR radio throu the OTG cable from the reach, but it is as likely as not going to power down after a few minutes. This is frustrating as if I want to use the RS as my base station and collect GCP’s and then fly the mission I cannot use the same base station if I want RTK.
Yes I know PPK is easier but RTK gives me realtime assurance of the quality of the collected data.