diff --git a/src/stick.rs b/src/stick.rs
index b02028a..ea3cedc 100644
--- a/src/stick.rs
+++ b/src/stick.rs
@@ -19,7 +19,7 @@ pub const NO_OF_CALIBRATION_POINTS: usize = 32;
 const MAX_ORDER: usize = 20;
 
 /// 28 degrees; this is the max angular deflection of the stick.
-const MAX_STICK_ANGLE: f32 = 0.4886921906;
+const MAX_STICK_ANGLE: f32 = 0.488_692_2;
 
 #[rustfmt::skip]
 //                                                                right        notch 1      up right     notch 2      up           notch 3      up left      notch 4      left         notch 5      down left    notch 6      down         notch 7      down right   notch 8
@@ -263,7 +263,7 @@ impl LinearizedCalibration {
         fit_points_x[1] = (in_x[6 + 1] + in_x[10 + 1]) / 2.0f64;
         fit_points_x[2] = in_x[0];
         fit_points_x[3] = (in_x[2 + 1] + in_x[14 + 1]) / 2.0f64;
-        fit_points_x[4] = in_x[0 + 1];
+        fit_points_x[4] = in_x[1];
 
         fit_points_y[0] = in_y[12 + 1];
         fit_points_y[1] = (in_y[10 + 1] + in_y[14 + 1]) / 2.0f64;
@@ -282,8 +282,8 @@ impl LinearizedCalibration {
         let x_zero_error = linearize(fit_points_x[2] as f32, &fit_coeffs_x.map(|e| e as f32));
         let y_zero_error = linearize(fit_points_y[2] as f32, &fit_coeffs_y.map(|e| e as f32));
 
-        fit_coeffs_x[3] = fit_coeffs_x[3] - x_zero_error as f64;
-        fit_coeffs_y[3] = fit_coeffs_y[3] - y_zero_error as f64;
+        fit_coeffs_x[3] -= x_zero_error as f64;
+        fit_coeffs_y[3] -= y_zero_error as f64;
 
         let mut linearized_points_x = [0f32; NO_OF_NOTCHES + 1];
         let mut linearized_points_y = [0f32; NO_OF_NOTCHES + 1];
@@ -798,9 +798,7 @@ fn trianglize<const N: usize>(matrix: &mut [[f64; N]; N]) -> i32 {
         }
         if max > 0 {
             sign = -sign;
-            let tmp = matrix[i];
-            matrix[i] = matrix[max];
-            matrix[max] = tmp;
+            matrix.swap(i, max);
         }
         if matrix[i][i] == 0. {
             return 0;