That's right it's 400 sets total. In reality we are ordering 400 blank sets from the keycap factory, then X sets go to the dyesub process.
I don't know why they don't have ISO. I suppose they don't since Asia doesn't use ISO generally but ANSI and they are a Chinese factory?
I was considering... since the MOQ number is the same... how would it feel about getting a little 'extras' from GMK in ABS blank black for ISO enter, 1.5 mod, 1.75 shift, 7x spacebar, and windowed lock keys? Assuming the price is cheap would people mind it get added into the sets? I know some people don't like idea of mixing keycap material but having keys to accommodate layout is better than nothing?