I am wanting to add a medium Egg to my XL in the near future. Are all sizes available at a discount from the Eggfests? If thats the case, I can wait until the Plano Eggfest to get one. The only thing is, last year they were only cooking on LG and XL's that I can remember. Any thoughts? From looking at the Georgia Eggfest site, all sizes are available.