Well I'm trying to do a neck set and it's a bit too loose. I may need to glue a thin shim, maybe a plane shaving, on one side or both of the mortice and then re-set the neck. I got a good fit on the bottom where it contacts the button of the back plate by using homemade carbon paper. I've got right at 6mm overstand is that the right word for it? And right at 26mm at the end of the finger board. I know it should be 27mm. It's not too late to increase the angle a little bit to get an extra 1mm there. But the string pressure on the bridge is going to push the top plate down a little bit so maybe the current 26mm is ok.