Even if the modifiers end up blank, and there are, say, 4 per keyboard in the 1x size, that'd be 500/4 = 125 sets ordered in each color with those modifiers included, at best. Etc. Will there be 125+ people interested in adding nonstandard modifiers? Likely not, based on the current numbers. Would have to add up the total cost and split it among everyone, unless there do happen to be enough extra modifier orders from interested paries. Just thinking out loud.