That is more commonly just called Level 4 or a 'Master Teacher' and is not a true grand master.

For many Usui Reiki healers there is only one grand master and that is Phyllis Furumoto (the granddaughter of Ms. Takata), but for all those that belief Furumoto is, there are as many that believe she is not preferring to take Barbara Weber Ray or Beth Gray as the title. Yet again, many do not believe that Takata actually was a grand master at all because she so totally changed the teaching of reiki from the original form that Usui Sensei taught.

In the UK we are moving closer towards regulation,

http://www.reikiregulation.org.uk/

http://www.reikifed.co.uk/pub/activ/vsr/index.shtml

I guess it was different in my day although that's not that long ago ... I was given Reiki masters and told by master that I was attuned to Reiki master/teacher. I don't believe there were any extra symbols however. I have both Traditional and Tibetan lineage .   I have been teaching and attuning to Reiki Masters. but only call myself a Reiki Master not Grand Master as I don't think any one in the west has even reached past Reiki II in the first instance all Reiki Masters that I know of and forgive me if I am wrong in anyone's case , still use placing symbols in the recipients aura as the method of attunement. The symbols were I gather just used for training puposes up to Reiki II and then  they were forgotten about as the Reiki practioner moved form having to rely on them for attunements and healing and into being able to feel and resonate their body at the right pitch for the symbols to get passed on.. having talked to Rinpoche's in Nepal etc, I know this is how any form of attunement  is practiced in the east, so as I say there is no one I know of that actually vibrates the attunement through themselves rather than  drawing and placing symbols . if you take the tuning fork example of one fork raising the vibration of the other to the same pitch quantum physically you as the master would be able to get the person to feel the vibration and pass it on without using symbols ...
A little of the point maybe but does anyone else out there perform attunements in this way or are we all actually pseudo masters and actually only at Reiki II ?

I'm just curious why all the hoopla with masters and grand masters because lets say you were able to be "attuned" to that of a grand master. What does that give you? Does it mean that is all there is? Surely everyone would agree that is not all there is? It is only the "level" to which that person has attained? Surely if you were to ask that grand master if there was more to be learned, they would say yes? And if you asked that grand master if much could still be learned from those of "lower" levels or on parallel paths, they would say yes? And if much can still be learned, what is so grand? What are we masters of, if not our own choices?

anyway, i babble. really don't mind me.

hi,
i agree with Sandyz.