I hate to keep asking so many questions, but I would hate it more if I messed up a beautiful spalted wood block when coring because I didn't get the information straight in my head before starting. I bought the easy core system of bowl coring but the instructions are non existent other than the grainy video which was some help. Are the boards they talk about for depth measurements? I have my knife sets running dead center after a little back yard engineering. I need to know more information on coring the different size bowls compared to the depth I can expect. So imagine me an empty vessel of this type coring and those of you who use them please remember when you first started and anything that helped you will no doubt help me. Please don't assume I know anything about this system and go from there. Thanks ahead of time.