I remember that almost one year ago I had watched a video where Jundo explained in great detail how to perform full floor prostrations. Things such as making fists with your hands as opposed to using them touching the ground with the palms, the correct position of the feet, etc.
I can't seem to find that link anymore, there's some basic explaination in the library, under zazenkai preparation but it doesn't go into such detail and I'd really like to improve my sloppy prostrations, espacially to try to do them as decently as I can during the zazenkai.
I'd really appreciate if someone could point me in the right direction.