Round 4 — fitted anvil (base stays inside the triangle)

Triangle width at each y: y=12.5 → 19.7 wide, y=14.5 → 17.4, y=18 → 12.7, y=20.5 → 11.0.
Anvil sized to: plate width 14, waist width 4, base width 8. Base sits at y=20.5 where the triangle is 11 wide — 1.5px breathing room on each side. Triangle apex (y=20.5→30) clearly visible below.
A7a — fitted polygon
Straight-line angled shoulders + flare. Base fits cleanly inside the triangle.
140px
64px
26px (tab)
A7b — fitted curved
Bezier curves at shoulder + base flare. Sculpted silhouette, sized to clear the triangle edges.
140px
64px
26px (tab)
A7c — fitted stepped
A7b with the raised step on top of the plate.
140px
64px
26px (tab)