Vaughn pretty much hit the nail on the head. I hollow at about 800 to 900 rpm. Keep my cuts light. I think Vaughn is dead on Dan in that don't worry about thin walls right now during the learning curve. My first few HF's walls were 1/4" thick. It wasn't until I had did 8 to 10 of them and was comfortable with the tool did I try for the thin 1/8" walls. Green wood is way easier than dry. I don't think I have turned maybe 2 dry HF's in 4 yrs. Keep a practicing. It will come.
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