BlackBerry Key2 to Document Camera

With classes moving to "online" due to the COVID-19 issues, a professor asked me for a design to hold a cell phone so it can be a document camera for telecon (Zoom) meetings.

This is sized for that professor's phone with case, a BlackBerry Key2 in a slim Tudia Merge case. My guess is that this is too specific for mass use, but it's being uploaded so others can see a cheap useable solution that may give other designers ideas.

The professor was using this octopus "helping hands" to hold the phone:

https://www.amazon.com/Third-Soldering-Workshop-Non-Slip-Aluminum/dp/B079CHJQKH/
Or
https://www.amazon.com/Crazepony-Soldering-Resistant-Swiveling-Brushless/dp/B06Y4393VM/

The phone is counterweighted with a cup of rocks from outside the professor's home.

There are two versions, one that uses tabs for the alligator clips (…_Holder2), the other has studs that replace the clips (…_Holder3), i.e. Remove the alligator clips, and insert the studs.

We found that three arms are n