Some may be aware of this issue but I thought it would be worth mentioning. The tripod socket for the new Sony camera is very shallow.... in fact so shallow that most of my plates or L Brackets bottom out. Most of my RRS plates bottom out and my Arca Swiss L Plate bottoms out along with my Sirui plate. Adding spacers between the plate and camera is one solution but I have found it very problematic. A washer on the bolt at the 'head' doesn't work as the spacing between the threads and head is too shallow and the bolt doesn't thread all the way through the plate.
Best method for me was to file a small amount of metal away from the threaded end. Very easy to do with a hand file. Its best to do this with the bolt threaded through the plate or with a small 'nut' screwed on - then the bolt can be backed out to straighten any threads if needed.