White Cane

This is very much a work in progress, and is not simple to print yet.

Please forgive my yellow "White" cane :D I just couldn't resist (and I'm running out of white).

This is intended to be a "White cane" (http://en.wikipedia.org/wiki/White_cane) for the blind or visually impaired... Warning I have no experience designing disability assistance devices nor do I have any experience with the blind or visually impaired, but I am open to feedback and willing to learn.

I think the diamiter is