diff --git a/src-frontend/src/hooks/useTauri.js b/src-frontend/src/hooks/useTauri.js
index 01a7be00..8a5c204f 100644
--- a/src-frontend/src/hooks/useTauri.js
+++ b/src-frontend/src/hooks/useTauri.js
@@ -38,7 +38,7 @@ export async function loadTestLetter(passIdx, ch, fontMm, dpi, thicknessPx) {
 // Default PaintParams must match Rust's `impl Default for PaintParams`.
 export const DEFAULT_PAINT_PARAMS = {
   brush_radius_factor:     0.88,
-  brush_radius_offset_px:  0.50,
+  brush_radius_offset_px:  0.53,
   brush_radius_percentile: 0.93,
   step_size_factor:       0.40,
   n_directions:           48,
@@ -56,7 +56,7 @@ export const DEFAULT_PAINT_PARAMS = {
   pen_lift_reach:         3.0,
   max_steps_per_stroke:   4000,
   max_strokes:            12,
-  output_rdp_eps:         1.0,
+  output_rdp_eps:         1.98,
 }
 
 export async function getPaintDebug(passIdx, hullIdx, params = DEFAULT_PAINT_PARAMS) {
diff --git a/src/brush_paint.rs b/src/brush_paint.rs
index ff5fd778..b335b445 100644
--- a/src/brush_paint.rs
+++ b/src/brush_paint.rs
@@ -153,7 +153,7 @@ impl Default for PaintParams {
             // letters miscounted) are NOT respected — known limitation
             // of the soft inner-score the meta search uses.
             brush_radius_factor:    0.88,
-            brush_radius_offset_px: 0.50,
+            brush_radius_offset_px: 0.53,
             brush_radius_percentile: 0.93,
             step_size_factor:       0.40,
             n_directions:           48,
@@ -171,7 +171,7 @@ impl Default for PaintParams {
             pen_lift_reach:         3.0,
             max_steps_per_stroke:   4000,
             max_strokes:            12,
-            output_rdp_eps:         1.0,
+            output_rdp_eps:         1.98,
         }
     }
 }
diff --git a/src/brush_paint_opt.rs b/src/brush_paint_opt.rs
index f169e278..3960ad2b 100644
--- a/src/brush_paint_opt.rs
+++ b/src/brush_paint_opt.rs
@@ -59,7 +59,7 @@ pub fn default_axes() -> Vec<Axis> {
             set: |p, v| p.overpaint_penalty = v, get: |p| p.overpaint_penalty },
         Axis { name: "step_size_factor",        lo: 0.20, hi: 0.90, is_int: false,
             set: |p, v| p.step_size_factor = v, get: |p| p.step_size_factor },
-        Axis { name: "lookahead_steps",         lo: 2.0,  hi: 6.0,  is_int: true,
+        Axis { name: "lookahead_steps",         lo: 5.0,  hi: 10.0, is_int: true,
             set: |p, v| p.lookahead_steps = v as usize, get: |p| p.lookahead_steps as f32 },
         Axis { name: "n_directions",            lo: 8.0,  hi: 64.0, is_int: true,
             set: |p, v| p.n_directions = v as usize, get: |p| p.n_directions as f32 },