Am trying to create clearance hole with near-side and far-side countersinks.

1. three part assembly, center part has an opening in the middle.  I'm trying to come in from outside and stop at the opening with out going all the way through the far side.  i.e. I only want the hole on one side of the stack.  I have sketched on inside surface going outward, and from outside surface going in, still no far side countersink.

2.  When using the "through all" option, the wizard picks up nearby parts that are not in the feature scope and uses them as the far side surface.  Hole preview shows the farside countersink sitting out in thin air outside the assembly.

I have resorted to revolved cuts, which are a logistics pain.

Would use a plain extruded cut through all and chamfer both ends, but chamfer does not seem to be a assembly feature.

Ideas??

TNX

Bob