I've done some considerable searching about dovetail joints, but haven't found anything that addresses the dimensions. I posted a photo of the dovetail drawn out on my neck and headblock below, I am curious as to what your thoughts are on the dimensions. I have looked on several different sets of plans and dimension A has varied between .75" and 1.00". while B has varied between .625" and .500". I am curious as to what size dovetail others use. Also, I am concerned that because the dovetail is too large at A that it will be too large to cut on the heel, so I will end up with a gap between the sides of the mortise and that of the dovetail tenon. Hope that makes sense.