Thanks fella's. Mark,the limbs are about 1/2"thick at the fades,tapering along the parallel limbs down to about 3/8",(at limb center),then 3/8" to just shy of the tips.If I'm not clear please ask again.One other note;with a pyramid design,the thickness should be even along the lenght,unlike this bow.For the design you want,I would start by roughing out at 1/2" thickness.If your wood is good and dry,this should be a safe margin to start with.It will probably end up being 3/8" or slightly thicker.Also,if you heat treat it,it may be thinner still.I heat treat mine after reaching brace height,(tillered),because hickory never fails to check when heated,(for me anyway).This way I'll have plenty of room to remove the checks during tillering. God Bless