Fusion 360 Hole & Bore Fix

I need a few precise edits made directly inside my Fusion 360 (.f3d) part file. The existing through-hole—currently somewhere in the 10 mm–50 mm range—must be resized to the new diameter I’ll supply once we start. Right after that, add a proper counter-bore so the fastener head sits flush, and then remove an unwanted construction/reference line that keeps showing up in the model.

Please keep the feature timeline clean, name any new parameters so I can adjust them later, and return the updated Fusion 360 file ready for CAM or DXF export. Let me know if you need any additional dimensions; otherwise this should be a quick task for someone comfortable with Fusion’s sketch and hole tools.