I have read the same also. This model does not have a pressure c-clamp. It uses a screw type clamp, you tighten just enough to hold, and it does not take much to do so. I will post a pic if interested.
Did you give the battery a full charge ? It takes more than a couple hours. Give customer service a call, sure to help you out... good luck. Hope you post updates...
My Radmini weighs in at 63 lb.... quite a load. This stand is very light and compact, uses very little real estate in storage. A bit $$ but will last a lifetime.
If I may suggest another option.... (I tried twice adjusting the freewheel tool, waste of time).
Check out this guy... https://m.youtube.com/channel/UCaAK2FaxQ2xiBbAUVZsvDYQ. This vid is called "freewheel removal without special tools."
My freewheel was changed out today, with his technique it...