I like this style.
Too me there seem to be some inconsistencies, for example the simplicity of the small z compared to the small x. I would rework R and W. I understand your 7 but it could look nicer.

many thanks. just gave them a quick rearranging as well as a bolder version. wanted to leave the W but looking at it again i think you're right. needs widening.

http://thomasjwpayne.com/blog/?p=724