That price is actually really good.
I mentioned this in the IC but would like to say it in the thread as well. For true mx hhkb compatibility could you add a bottom row 1u alt (would 100% buy if it had this) also if you are gonna include mod tilde you might as well include mod pipe as well.
Also Also why was it changed from r5 to r4, not against it but considering the inspiration it seems weird to do so.
but this is still really cool, will probably pick it up when it goes to GB.