Oh jeeze, I probably won't be awake in time to snag a slot. How bothersome. Well, if they don't all get taken immediately, I'll be trying to take one. Have you ever thought of just opening them for the entire day and just choosing the four that you feel you'd like to do the most? With the amount of interest you have in your work I'm sure you'd have the luxury of more choice.

Maybe at some point I'll go back to having a waiting list (just not doing that for now so I can have some rest days without worrying about making people wait too long).
If not I may do something similar to what you said mostly to pick people who been wanting to get ones of these for a while.