I have created a test fixture for vibration. The top surface has threaded holes for mounting our valve and a supply port. My problem is they are on A compound angle surface. I have created A detail drawing of the fixture but i'm not sure if i am calling out the holes on the compound surface correctly due to the angles. I have made one edge of the block virticle ref. but the holes still look like they are off a little and not sure if I am dimensioning them correctly. Anyone run into this before?