diff --git a/post_cap.py b/post_cap.py
index 8faaa8e..650a944 100644
--- a/post_cap.py
+++ b/post_cap.py
@@ -25,36 +25,21 @@ with BuildPart() as p:
         with Locations((punkt1.Z, 0)):
             Ellipse(4 / 2, 10 / 2)
     sweep(path=ucho)
+# with BuildPart() as bo:
     with BuildSketch(Plane.XZ) as s1:
-        # Trapezoid(18, 6, 80, 88, align=Align.MIN)
         Trapezoid(42, 37, 86, align=(Align.CENTER, Align.MIN))
         split(bisect_by=Plane.YZ)
-    t3 = revolve(axis=Axis.Z)
-    t4 = t3.faces().sort_by(Axis.Z)[-1].edge()
-    t5 = fillet(t4, 1)
+    t3 = revolve(axis=Axis.Z, mode=Mode.PRIVATE)
+    krawedz = t3.faces().sort_by(Axis.Z)[-1].edge()
+    # t5 = fillet(t4, 1.5)
+    t3 = t3.fillet(radius=1.5, edge_list=[krawedz])
+    add(t3, mode=Mode.SUBTRACT)
 
-debug(t3)
-debug(t4)
+show_object(p)
 
-# export_step(p.part, "/home/pali112/Build123d/debug.step")
-
-# with BuildPart() as testowo:
-#     with BuildSketch(Plane.XZ) as s1:
-#         # Trapezoid(18, 6, 80, 88, align=Align.MIN)
-#         Trapezoid(42, 37, 86, align=(Align.CENTER, Align.MIN))
-#         split(bisect_by=Plane.YZ)
-#     t3 = revolve(axis=Axis.Z)
-#     t4 = testowo.faces().sort_by(Axis.Z)[-1].edge()
-#     t5 = fillet(t4, 3 / 2)
-
-# export_step(testowo.part, "/home/pali112/Build123d/debug.step")
-
-# show_object(testowo)
-
-# debug(punkt1, name="punkt1")
-# debug(t3, name="t3")
-# debug(s3.sketch, name="s3")
-# debug(s2.sketch, name="s2")
-# debug(l1.line, name="ucho")
-# show_object(p)
-# debug(s.sketch, name="kubek")
+got_mass = p.part.volume * densc
+want_mass = 43.09
+tolerance = 1
+delta = abs(got_mass - want_mass)
+print(f"Mass: {got_mass:0.2f} g")
+assert delta < tolerance, f'{got_mass=}, {want_mass=}, {delta=}, {tolerance=}'