Well, Alan in his ADD exuberance went out and bought a brand new 1 1/2 inch hole saw and while he was down at the lumber yard decided to get a brand new 1 1/2 inch spade bit to make sure that the holes were perfect. Got home and chucked up that hole saw and made the purtiest tenon you ever saw. Then I drilled a hole with that new bit and realized.....
Hole saw OD is 1 1/2 inch and ID is not.
Oh well, It still worked perfectly, I just gotta get the sizes right. You gotta drill your hole to match the ID on the hole saw.
Alan