@Muirium: Well that has a simple explanation, I love Cherry/GMK caps, but you don't find the caps with the correct legends in order to have the split backspace and I hate to put just any cap only for a true HHKB layout. Also o be honest I like |\ right where it is, as a UNIX/Linux admin I use that so often that I find it very nice to have it right where it is.
All my MX 60% are built like that only the bottom row differs, on some I have 1.5-1-1.5-7-1.5-1-1.5 on other boards I have 1.25-1.25-1.25-6.25-1.25-1.25-1.25-1.25 just because for some keysets it looks better a way or the other.
@HzFaq: I like my |\ in the same colour as the mods with GMK HyperFuse, otherwise it's too much white
I know an extra key is nice for the other thing I use a lot as a Linux/UNIX and that's `~ but I have it mapped on Tab /Fn layer. I have the same layout on my boards so I've got used to it.
@scottc : here you have it http://blog.winkeyless.kr/183
but I don't know if it works also with faceW, the faceB PCB I have has a newer version of the firmware and I don't know if it's compatible but you can give it a try. It's very good.