I hate to see empty spaces the next day . You have to find a new way. 2.5 degrees 2.5+2.5= 5 degrees The lower part had to be thinner than the saw blade thickness to make it easier to work. I see things that have failed. It has a wide joint surface and is very strong. I have come to the conclusion that it is worth doing. The depth of the saw blade was important. Note please. Each tree has different properties, so test it beforehand..