david,
i think it will be mostly 3/4" stock. but i have not seen the pile i am pulling it from yet. so this is just a guess. it is at a friends farm 3 hours south. he had a walnut tree come down many years ago, he had it milled up, and it had been sitting in a barn ever since. i have only seen some of the small boards, and they were 3/4". but that is the stuff with some crazy grain. i would rather he save that for himself.
from reading robs post it sounds like it will be a two blade system. i was just asking my previous question, so that my line of thinking was on the same page as rob's. i am most curious about how (if two blade system) the t&g will line up consistently, once you change the blades out from the tongue blade to the groove blade.