Got a small dovetail fixture for Christmas that does 1/2" and 1/4" dovetails. Does it matter what the angle is? The instructions give a part # for the 1/4" dovetail bit but at the store the salesman gets mistified and starts speaking in tongues and wants to sell me a 1/4" straight bit. I need a small cutter because my project material is only 3/8" thick. Can anyone give me an actual size of the cutter I need to make 1/4" dovetails and I can go to Amana, they have it all. Thanks to anyone that can shed light.