Hello. My name is Shawn. I've only been knapping for about a year, off and on. I have a question about working slabs. I've watched a lot of videos about pressure flaking slabs but I have yet to see one where they explain how to thin the base down. The problem I'm having is I keep getting steps/hinges...not sure exactly which is which lol. So, what's the best way to do the base? Should I flake down the edges most of the way then shoot some flakes from the base? Or should I alternate doing a little from the sides and base as I go? I can't seem to get it to blend in. Another question, I see points that have perfect flake patterns. Is it possible to get this without wet grinding? Any help would be greatly appreciated! Thanks!!