It’s better not to do it yourself. I’ve done my old frame a couple of times to kind of see what works best and in the end you might as well just get it professionally done with either bedford or unicycle.com.
I know that most yuni frames fit the KH 2005 hub also darren powder coats all sorts of things (including rims and spokes). just phone or email him, i think it is pretty cheap. if you don’t know his website is www.bedfordunicycles.ca