I really hope that its possible to do a drop with a non kon-peki ink because I'm seriously sick of that ink getting all the press when there are so many more interesting and amazing colours in the Iroshizuku like Shin-kai and Murasaki-shikibu!
ExeArcoI'm pretty sure they won't do a drop with only 1 colour in it, I would be surprised if you couldn't choose from all of them. I think I'll be going for the orange, myself.