Unfortunately we don't have the margins on some items from other manufacturers to allow us to do 20% off. The excluded items are few, but the boards are one if them. However you will always get 10% off year round from us on anything and everything on our site, made by us or supplied other sources.
I'll tell you what. If you order them tonight during the sale I'll give you 15% as a courtesy this one time. Let me know your name and after you place the order I'll credit you back the 15% since there's no code for it. Hope you find this fair and to your liking.