Yeah , and we chose a V_ plus and V_ minus.
all these things have cost implications. And so when I done my thing on cost  a  I had assumed that the only uh button that would be a different colour would be the uh the red apple button. So  However , I've now .  But um ,  yeah so uh but there would be a cost implication on that ,
I'll see if I can find them.
and uh  as I suppose that  so whether  wanted to put in all these colours , would be uh open to debate , I suppose.