I just got some used PW Plus (not the Plus II) and the hotshoe is not tight. I mount it on the camera and the unit wobbling around the shoe quite a bit.
If someone has PW Plus, can you check yours? Does the unit and the shoe fit tightly together?
I opened it up and didnt see anything to screw the show down, it just held by 2 screws going on the side.
Also, one of the shoe and the antenna broke on the other unit so I ordered the spare parts from PW.

