Here is a remix of the Phone Mount by doctriam. The arms are surprisingly strong. Strong enough to hold up the Yeti Blue microphone! Make sure you use at least 85% infill on parts nearest the desk connector and use supports. I originally used 24% infill PLA and one of the threaded rods broke. 85% held up great!
The desk connector part needs 4 small common wood screws. The holes are off-set and the width between the two side pieces matched the MDF on my particular desk. Make sure to print it upright and use some pliers to pop out the temporary supports on the desk attachment.
When attaching the mic, use the little rubber washers between the mic itself and the printed part. The dimensions match the holder that the mic comes with so it fits together the same exact way.