I am trying to create a chamfer from one sureface to another with a specific angle to go to the other surface. But I find it difficult to do so with out removing or adding too much material. I just want the chamfer to start at the edge of one surface and meet the next surface at a specified angle. I can not do this without calculating the actual distance the chamfer will be. Is there any way of doing without actually calculating the distance? Attached is a picture of the surfaces I want to chamfer