@djlambson You don't have to rework them from the beginning, just tweak them in photoshop, vibrance, contrast, curves.... Advice: if you work in RGB and want to convert to cmyk first flatten all the layers and then convert. Also, there have to be some difference in cmyk because rgb has some range of colors that can't be printed. My advice is, if you plan to print your work, always draw in cmyk mode and later convert to rgb. The thing is, it's easier to convert cmyk to rgb without loosing quality of the colors. I hope this helps, if you have any trouble, I can help with tweaking in photoshop, just send me a message.
